diff --git a/app/(app)/dashboard/page.tsx b/app/(app)/dashboard/page.tsx
index 80267b3..3e9b91a 100644
--- a/app/(app)/dashboard/page.tsx
+++ b/app/(app)/dashboard/page.tsx
@@ -4,7 +4,7 @@ import DashboardUnsortedWidget from "@/components/dashboard/unsorted-widget"
 import { WelcomeWidget } from "@/components/dashboard/welcome-widget"
 import { Separator } from "@/components/ui/separator"
 import { getCurrentUser } from "@/lib/auth"
-import { APP_DESCRIPTION } from "@/lib/constants"
+import config from "@/lib/config"
 import { getUnsortedFiles } from "@/models/files"
 import { getSettings } from "@/models/settings"
 import { TransactionFilters } from "@/models/transactions"
@@ -12,7 +12,7 @@ import { Metadata } from "next"
 
 export const metadata: Metadata = {
   title: "Dashboard",
-  description: APP_DESCRIPTION,
+  description: config.app.description,
 }
 
 export default async function Dashboard({ searchParams }: { searchParams: Promise<TransactionFilters> }) {
diff --git a/app/(app)/layout.tsx b/app/(app)/layout.tsx
index e927e64..a1c3b7f 100644
--- a/app/(app)/layout.tsx
+++ b/app/(app)/layout.tsx
@@ -4,7 +4,7 @@ import { AppSidebar } from "@/components/sidebar/sidebar"
 import { SidebarInset, SidebarProvider } from "@/components/ui/sidebar"
 import { Toaster } from "@/components/ui/sonner"
 import { getCurrentUser } from "@/lib/auth"
-import { APP_DESCRIPTION, APP_TITLE } from "@/lib/constants"
+import config from "@/lib/config"
 import { getUnsortedFilesCount } from "@/models/files"
 import type { Metadata, Viewport } from "next"
 import "../globals.css"
@@ -13,9 +13,9 @@ import { NotificationProvider } from "./context"
 export const metadata: Metadata = {
   title: {
     template: "%s | TaxHacker",
-    default: APP_TITLE,
+    default: config.app.title,
   },
-  description: APP_DESCRIPTION,
+  description: config.app.description,
   icons: {
     icon: "/favicon.ico",
     shortcut: "/favicon.ico",
@@ -38,13 +38,14 @@ export default async function RootLayout({ children }: { children: React.ReactNo
         <SidebarProvider>
           <MobileMenu unsortedFilesCount={unsortedFilesCount} />
           <AppSidebar
-            unsortedFilesCount={unsortedFilesCount}
             profile={{
               id: user.id,
               name: user.name || "",
               email: user.email,
               avatar: user.avatar || undefined,
             }}
+            unsortedFilesCount={unsortedFilesCount}
+            isSelfHosted={config.selfHosted.isEnabled}
           />
           <SidebarInset className="w-full h-full mt-[60px] md:mt-0 overflow-auto">{children}</SidebarInset>
         </SidebarProvider>
diff --git a/app/(app)/settings/llm/page.tsx b/app/(app)/settings/llm/page.tsx
index eee2ee3..7e03191 100644
--- a/app/(app)/settings/llm/page.tsx
+++ b/app/(app)/settings/llm/page.tsx
@@ -1,5 +1,6 @@
 import LLMSettingsForm from "@/components/settings/llm-settings-form"
 import { getCurrentUser } from "@/lib/auth"
+import config from "@/lib/config"
 import { getFields } from "@/models/fields"
 import { getSettings } from "@/models/settings"
 
@@ -11,7 +12,7 @@ export default async function LlmSettingsPage() {
   return (
     <>
       <div className="w-full max-w-2xl">
-        <LLMSettingsForm settings={settings} fields={fields} />
+        <LLMSettingsForm settings={settings} fields={fields} showApiKey={config.selfHosted.isEnabled} />
       </div>
     </>
   )
diff --git a/app/(app)/unsorted/actions.ts b/app/(app)/unsorted/actions.ts
index 23a1d89..18c3b43 100644
--- a/app/(app)/unsorted/actions.ts
+++ b/app/(app)/unsorted/actions.ts
@@ -6,7 +6,7 @@ import { buildLLMPrompt } from "@/ai/prompt"
 import { fieldsToJsonSchema } from "@/ai/schema"
 import { transactionFormSchema } from "@/forms/transactions"
 import { getCurrentUser } from "@/lib/auth"
-import { IS_SELF_HOSTED_MODE } from "@/lib/constants"
+import config from "@/lib/config"
 import { getTransactionFileUploadPath, getUserUploadsDirectory } from "@/lib/files"
 import { DEFAULT_PROMPT_ANALYSE_NEW_FILE } from "@/models/defaults"
 import { deleteFile, getFileById, updateFile } from "@/models/files"
@@ -50,7 +50,7 @@ export async function analyzeFileAction(
     prompt,
     schema,
     attachments,
-    IS_SELF_HOSTED_MODE ? settings.openai_api_key : process.env.OPENAI_API_KEY || ""
+    config.selfHosted.isEnabled ? settings.openai_api_key : process.env.OPENAI_API_KEY || ""
   )
 
   console.log("Analysis results:", results)
diff --git a/app/(app)/unsorted/page.tsx b/app/(app)/unsorted/page.tsx
index 53e4aa1..b796733 100644
--- a/app/(app)/unsorted/page.tsx
+++ b/app/(app)/unsorted/page.tsx
@@ -5,7 +5,7 @@ import { Button } from "@/components/ui/button"
 import { Card } from "@/components/ui/card"
 import AnalyzeForm from "@/components/unsorted/analyze-form"
 import { getCurrentUser } from "@/lib/auth"
-import { IS_SELF_HOSTED_MODE } from "@/lib/constants"
+import config from "@/lib/config"
 import { getCategories } from "@/models/categories"
 import { getCurrencies } from "@/models/currencies"
 import { getFields } from "@/models/fields"
@@ -36,7 +36,7 @@ export default async function UnsortedPage() {
         <h2 className="text-3xl font-bold tracking-tight">You have {files.length} unsorted files</h2>
       </header>
 
-      {IS_SELF_HOSTED_MODE && !settings.openai_api_key && (
+      {config.selfHosted.isEnabled && !settings.openai_api_key && (
         <Alert>
           <Settings className="h-4 w-4 mt-2" />
           <div className="flex flex-row justify-between pt-2">
diff --git a/app/(auth)/enter/page.tsx b/app/(auth)/enter/page.tsx
index eb2e8e4..821b5c9 100644
--- a/app/(auth)/enter/page.tsx
+++ b/app/(auth)/enter/page.tsx
@@ -1,12 +1,12 @@
 import { LoginForm } from "@/components/auth/login-form"
 import { Card, CardContent, CardTitle } from "@/components/ui/card"
 import { ColoredText } from "@/components/ui/colored-text"
-import { IS_SELF_HOSTED_MODE, SELF_HOSTED_REDIRECT_URL } from "@/lib/constants"
+import config from "@/lib/config"
 import { redirect } from "next/navigation"
 
 export default async function LoginPage() {
-  if (IS_SELF_HOSTED_MODE) {
-    redirect(SELF_HOSTED_REDIRECT_URL)
+  if (config.selfHosted.isEnabled) {
+    redirect(config.selfHosted.redirectUrl)
   }
 
   return (
diff --git a/app/(auth)/self-hosted/page.tsx b/app/(auth)/self-hosted/page.tsx
index fad9a7d..d019da5 100644
--- a/app/(auth)/self-hosted/page.tsx
+++ b/app/(auth)/self-hosted/page.tsx
@@ -3,7 +3,7 @@ import { FormInput } from "@/components/forms/simple"
 import { Button } from "@/components/ui/button"
 import { Card, CardDescription, CardTitle } from "@/components/ui/card"
 import { ColoredText } from "@/components/ui/colored-text"
-import { IS_SELF_HOSTED_MODE, SELF_HOSTED_REDIRECT_URL } from "@/lib/constants"
+import config from "@/lib/config"
 import { DEFAULT_CURRENCIES, DEFAULT_SETTINGS } from "@/models/defaults"
 import { getSelfHostedUser } from "@/models/users"
 import { ShieldAlert } from "lucide-react"
@@ -11,7 +11,7 @@ import { redirect } from "next/navigation"
 import { selfHostedGetStartedAction } from "../actions"
 
 export default async function SelfHostedWelcomePage() {
-  if (!IS_SELF_HOSTED_MODE) {
+  if (!config.selfHosted.isEnabled) {
     return (
       <Card className="w-full max-w-xl mx-auto p-8 flex flex-col items-center justify-center gap-6">
         <CardTitle className="text-2xl font-bold flex items-center gap-2">
@@ -31,7 +31,7 @@ export default async function SelfHostedWelcomePage() {
 
   const user = await getSelfHostedUser()
   if (user) {
-    redirect(SELF_HOSTED_REDIRECT_URL)
+    redirect(config.selfHosted.redirectUrl)
   }
 
   return (
diff --git a/app/(auth)/self-hosted/redirect/route.ts b/app/(auth)/self-hosted/redirect/route.ts
index b19254e..671c281 100644
--- a/app/(auth)/self-hosted/redirect/route.ts
+++ b/app/(auth)/self-hosted/redirect/route.ts
@@ -1,17 +1,17 @@
-import { AUTH_LOGIN_URL, IS_SELF_HOSTED_MODE, SELF_HOSTED_WELCOME_URL } from "@/lib/constants"
+import config from "@/lib/config"
 import { createUserDefaults, isDatabaseEmpty } from "@/models/defaults"
 import { getSelfHostedUser } from "@/models/users"
 import { revalidatePath } from "next/cache"
 import { redirect } from "next/navigation"
 
 export async function GET(request: Request) {
-  if (!IS_SELF_HOSTED_MODE) {
-    redirect(AUTH_LOGIN_URL)
+  if (!config.selfHosted.isEnabled) {
+    redirect(config.auth.loginUrl)
   }
 
   const user = await getSelfHostedUser()
   if (!user) {
-    redirect(SELF_HOSTED_WELCOME_URL)
+    redirect(config.selfHosted.welcomeUrl)
   }
 
   if (await isDatabaseEmpty(user.id)) {
diff --git a/app/(auth)/signup/page.tsx b/app/(auth)/signup/page.tsx
index 4c1b1f3..b1d0e6b 100644
--- a/app/(auth)/signup/page.tsx
+++ b/app/(auth)/signup/page.tsx
@@ -1,11 +1,12 @@
+import SignupForm from "@/components/auth/signup-form"
 import { Card, CardContent, CardTitle } from "@/components/ui/card"
 import { ColoredText } from "@/components/ui/colored-text"
-import { IS_SELF_HOSTED_MODE, SELF_HOSTED_REDIRECT_URL } from "@/lib/constants"
+import config from "@/lib/config"
 import { redirect } from "next/navigation"
 
 export default async function LoginPage() {
-  if (IS_SELF_HOSTED_MODE) {
-    redirect(SELF_HOSTED_REDIRECT_URL)
+  if (config.selfHosted.isEnabled) {
+    redirect(config.selfHosted.redirectUrl)
   }
 
   return (
@@ -15,10 +16,13 @@ export default async function LoginPage() {
         <ColoredText>TaxHacker: Cloud Edition</ColoredText>
       </CardTitle>
       <CardContent className="w-full">
-        <div className="text-center text-md text-muted-foreground">
-          Creating new account is disabled for now. Please use the self-hosted version.
-        </div>
-        {/* <SignupForm /> */}
+        {config.auth.disableSignup ? (
+          <div className="text-center text-md text-muted-foreground">
+            Creating new account is disabled for now. Please use the self-hosted version.
+          </div>
+        ) : (
+          <SignupForm />
+        )}
       </CardContent>
     </Card>
   )
diff --git a/app/landing/actions.ts b/app/landing/actions.ts
index 9f649fe..2be5d7a 100644
--- a/app/landing/actions.ts
+++ b/app/landing/actions.ts
@@ -1,5 +1,6 @@
 "use server"
 
+import config from "@/lib/config"
 import { resend, sendNewsletterWelcomeEmail } from "@/lib/email"
 
 export async function subscribeToNewsletterAction(email: string) {
@@ -9,7 +10,7 @@ export async function subscribeToNewsletterAction(email: string) {
     }
 
     const existingContacts = await resend.contacts.list({
-      audienceId: process.env.RESEND_AUDIENCE_ID as string,
+      audienceId: config.email.audienceId,
     })
 
     if (existingContacts.data) {
@@ -22,7 +23,7 @@ export async function subscribeToNewsletterAction(email: string) {
 
     await resend.contacts.create({
       email,
-      audienceId: process.env.RESEND_AUDIENCE_ID as string,
+      audienceId: config.email.audienceId,
       unsubscribed: false,
     })
 
diff --git a/app/layout.tsx b/app/layout.tsx
index 561efae..14eff72 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -1,13 +1,13 @@
+import config from "@/lib/config"
 import type { Metadata, Viewport } from "next"
 import "./globals.css"
-import { APP_DESCRIPTION, APP_TITLE } from "@/lib/constants"
 
 export const metadata: Metadata = {
   title: {
     template: "%s | TaxHacker",
-    default: APP_TITLE,
+    default: config.app.title,
   },
-  description: APP_DESCRIPTION,
+  description: config.app.description,
   icons: {
     icon: "/favicon.ico",
     shortcut: "/favicon.ico",
diff --git a/app/page.tsx b/app/page.tsx
index 2efda84..a072dd1 100644
--- a/app/page.tsx
+++ b/app/page.tsx
@@ -1,13 +1,13 @@
 import LandingPage from "@/app/landing/landing"
 import { getSession } from "@/lib/auth"
-import { IS_SELF_HOSTED_MODE, SELF_HOSTED_REDIRECT_URL } from "@/lib/constants"
+import config from "@/lib/config"
 import { redirect } from "next/navigation"
 
 export default async function Home() {
   const session = await getSession()
   if (!session) {
-    if (IS_SELF_HOSTED_MODE) {
-      redirect(SELF_HOSTED_REDIRECT_URL)
+    if (config.selfHosted.isEnabled) {
+      redirect(config.selfHosted.redirectUrl)
     }
     return <LandingPage />
   }
diff --git a/components/dashboard/drop-zone-widget.tsx b/components/dashboard/drop-zone-widget.tsx
index 92c8e3a..f67d815 100644
--- a/components/dashboard/drop-zone-widget.tsx
+++ b/components/dashboard/drop-zone-widget.tsx
@@ -3,7 +3,7 @@
 import { useNotification } from "@/app/(app)/context"
 import { uploadFilesAction } from "@/app/(app)/files/actions"
 import { FormError } from "@/components/forms/error"
-import { FILE_ACCEPTED_MIMETYPES } from "@/lib/constants"
+import config from "@/lib/config"
 import { Camera, Loader2 } from "lucide-react"
 import { useRouter } from "next/navigation"
 import { startTransition, useState } from "react"
@@ -48,7 +48,7 @@ export default function DashboardDropZoneWidget() {
           id="fileInput"
           className="hidden"
           multiple
-          accept={FILE_ACCEPTED_MIMETYPES}
+          accept={config.upload.acceptedMimeTypes}
           onChange={handleFileChange}
         />
         <div className="flex flex-col items-center justify-center gap-4 p-8 text-center h-full">
diff --git a/components/files/upload-button.tsx b/components/files/upload-button.tsx
index d6e7417..e9d7a78 100644
--- a/components/files/upload-button.tsx
+++ b/components/files/upload-button.tsx
@@ -3,7 +3,7 @@
 import { useNotification } from "@/app/(app)/context"
 import { uploadFilesAction } from "@/app/(app)/files/actions"
 import { Button } from "@/components/ui/button"
-import { FILE_ACCEPTED_MIMETYPES } from "@/lib/constants"
+import config from "@/lib/config"
 import { Loader2 } from "lucide-react"
 import { useRouter } from "next/navigation"
 import { ComponentProps, startTransition, useRef, useState } from "react"
@@ -54,7 +54,7 @@ export function UploadButton({ children, ...props }: { children: React.ReactNode
         id="fileInput"
         className="hidden"
         multiple
-        accept={FILE_ACCEPTED_MIMETYPES}
+        accept={config.upload.acceptedMimeTypes}
         onChange={handleFileChange}
       />
 
diff --git a/components/settings/llm-settings-form.tsx b/components/settings/llm-settings-form.tsx
index 0f42272..466b2ea 100644
--- a/components/settings/llm-settings-form.tsx
+++ b/components/settings/llm-settings-form.tsx
@@ -6,29 +6,40 @@ import { FormError } from "@/components/forms/error"
 import { FormInput, FormTextarea } from "@/components/forms/simple"
 import { Button } from "@/components/ui/button"
 import { Card, CardTitle } from "@/components/ui/card"
-import { IS_SELF_HOSTED_MODE } from "@/lib/constants"
 import { Field } from "@prisma/client"
 import { CircleCheckBig, Edit } from "lucide-react"
 import Link from "next/link"
 import { useActionState } from "react"
 
-export default function LLMSettingsForm({ settings, fields }: { settings: Record<string, string>; fields: Field[] }) {
+export default function LLMSettingsForm({
+  settings,
+  fields,
+  showApiKey = true,
+}: {
+  settings: Record<string, string>
+  fields: Field[]
+  showApiKey?: boolean
+}) {
   const [saveState, saveAction, pending] = useActionState(saveSettingsAction, null)
 
   return (
     <>
       <form action={saveAction} className="space-y-4">
-        {IS_SELF_HOSTED_MODE && (
-          <FormInput title="OpenAI API Key" name="openai_api_key" defaultValue={settings.openai_api_key} />
-        )}
+        {showApiKey && (
+          <>
+            <FormInput title="OpenAI API Key" name="openai_api_key" defaultValue={settings.openai_api_key} />
 
-        {IS_SELF_HOSTED_MODE && (
-          <small className="text-muted-foreground">
-            Get your API key from{" "}
-            <a href="https://platform.openai.com/settings/organization/api-keys" target="_blank" className="underline">
-              OpenAI Platform Console
-            </a>
-          </small>
+            <small className="text-muted-foreground">
+              Get your API key from{" "}
+              <a
+                href="https://platform.openai.com/settings/organization/api-keys"
+                target="_blank"
+                className="underline"
+              >
+                OpenAI Platform Console
+              </a>
+            </small>
+          </>
         )}
 
         <FormTextarea
diff --git a/components/sidebar/mobile-menu.tsx b/components/sidebar/mobile-menu.tsx
index 1ae9da1..b258be7 100644
--- a/components/sidebar/mobile-menu.tsx
+++ b/components/sidebar/mobile-menu.tsx
@@ -2,7 +2,7 @@
 
 import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar"
 import { useSidebar } from "@/components/ui/sidebar"
-import { APP_TITLE } from "@/lib/constants"
+import config from "@/lib/config"
 import Link from "next/link"
 
 export default function MobileMenu({ unsortedFilesCount }: { unsortedFilesCount: number }) {
@@ -15,7 +15,7 @@ export default function MobileMenu({ unsortedFilesCount }: { unsortedFilesCount:
         <AvatarFallback className="rounded-lg">AI</AvatarFallback>
       </Avatar>
       <Link href="/" className="text-lg font-bold">
-        {APP_TITLE}
+        {config.app.title}
       </Link>
       <Link
         href="/unsorted"
diff --git a/components/sidebar/sidebar-user.tsx b/components/sidebar/sidebar-user.tsx
index b98e1c5..97b63b7 100644
--- a/components/sidebar/sidebar-user.tsx
+++ b/components/sidebar/sidebar-user.tsx
@@ -10,12 +10,11 @@ import {
 import { SidebarMenuButton } from "@/components/ui/sidebar"
 import { UserProfile } from "@/lib/auth"
 import { authClient } from "@/lib/auth-client"
-import { IS_SELF_HOSTED_MODE } from "@/lib/constants"
 import { LogOut, MoreVertical, User } from "lucide-react"
 import Link from "next/link"
 import { redirect } from "next/navigation"
 
-export default function SidebarUser({ profile }: { profile: UserProfile }) {
+export default function SidebarUser({ profile, isSelfHosted }: { profile: UserProfile; isSelfHosted: boolean }) {
   const signOut = async () => {
     await authClient.signOut({})
     redirect("/")
@@ -61,14 +60,16 @@ export default function SidebarUser({ profile }: { profile: UserProfile }) {
             </Link>
           </DropdownMenuItem> */}
         </DropdownMenuGroup>
-        <DropdownMenuSeparator />
-        {!IS_SELF_HOSTED_MODE && (
-          <DropdownMenuItem asChild>
-            <span onClick={signOut} className="flex items-center gap-2 text-red-600 cursor-pointer">
-              <LogOut className="h-4 w-4" />
-              Log out
-            </span>
-          </DropdownMenuItem>
+        {!isSelfHosted && (
+          <>
+            <DropdownMenuSeparator />
+            <DropdownMenuItem asChild>
+              <span onClick={signOut} className="flex items-center gap-2 text-red-600 cursor-pointer">
+                <LogOut className="h-4 w-4" />
+                Log out
+              </span>
+            </DropdownMenuItem>
+          </>
         )}
       </DropdownMenuContent>
     </DropdownMenu>
diff --git a/components/sidebar/sidebar.tsx b/components/sidebar/sidebar.tsx
index 8c094d1..71a318d 100644
--- a/components/sidebar/sidebar.tsx
+++ b/components/sidebar/sidebar.tsx
@@ -17,7 +17,7 @@ import {
   useSidebar,
 } from "@/components/ui/sidebar"
 import { UserProfile } from "@/lib/auth"
-import { APP_TITLE, IS_SELF_HOSTED_MODE } from "@/lib/constants"
+import config from "@/lib/config"
 import { ClockArrowUp, FileText, Import, LayoutDashboard, Settings, Sparkles, Upload } from "lucide-react"
 import Image from "next/image"
 import Link from "next/link"
@@ -28,7 +28,15 @@ import { Blinker } from "./blinker"
 import { SidebarMenuItemWithHighlight } from "./sidebar-item"
 import SidebarUser from "./sidebar-user"
 
-export function AppSidebar({ unsortedFilesCount, profile }: { unsortedFilesCount: number; profile: UserProfile }) {
+export function AppSidebar({
+  profile,
+  unsortedFilesCount,
+  isSelfHosted,
+}: {
+  profile: UserProfile
+  unsortedFilesCount: number
+  isSelfHosted: boolean
+}) {
   const { open, setOpenMobile } = useSidebar()
   const pathname = usePathname()
   const { notification } = useNotification()
@@ -46,7 +54,7 @@ export function AppSidebar({ unsortedFilesCount, profile }: { unsortedFilesCount
             <Image src="/logo/256.png" alt="Logo" className="h-10 w-10 rounded-lg" width={40} height={40} />
             <div className="grid flex-1 text-left leading-tight">
               <span className="truncate font-semibold text-lg">
-                <ColoredText>{APP_TITLE}</ColoredText>
+                <ColoredText>{config.app.title}</ColoredText>
               </span>
             </div>
           </Link>
@@ -124,7 +132,7 @@ export function AppSidebar({ unsortedFilesCount, profile }: { unsortedFilesCount
                     </Link>
                   </SidebarMenuButton>
                 </SidebarMenuItem>
-                {IS_SELF_HOSTED_MODE && (
+                {isSelfHosted && (
                   <SidebarMenuItem>
                     <SidebarMenuButton asChild>
                       <Link href="https://vas3k.com/donate/" target="_blank">
@@ -146,7 +154,7 @@ export function AppSidebar({ unsortedFilesCount, profile }: { unsortedFilesCount
             <SidebarGroupContent>
               <SidebarMenu>
                 <SidebarMenuItem>
-                  <SidebarUser profile={profile} />
+                  <SidebarUser profile={profile} isSelfHosted={isSelfHosted} />
                 </SidebarMenuItem>
               </SidebarMenu>
             </SidebarGroupContent>
diff --git a/components/transactions/transaction-files.tsx b/components/transactions/transaction-files.tsx
index 2d91230..6ad52b9 100644
--- a/components/transactions/transaction-files.tsx
+++ b/components/transactions/transaction-files.tsx
@@ -4,7 +4,7 @@ import { deleteTransactionFileAction, uploadTransactionFilesAction } from "@/app
 import { FilePreview } from "@/components/files/preview"
 import { Button } from "@/components/ui/button"
 import { Card } from "@/components/ui/card"
-import { FILE_ACCEPTED_MIMETYPES } from "@/lib/constants"
+import config from "@/lib/config"
 import { File, Transaction } from "@prisma/client"
 import { Loader2, Upload, X } from "lucide-react"
 import { useState } from "react"
@@ -72,7 +72,7 @@ export default function TransactionFiles({ transaction, files }: { transaction:
             name="file"
             className="absolute inset-0 top-0 left-0 w-full h-full opacity-0"
             onChange={handleFileChange}
-            accept={FILE_ACCEPTED_MIMETYPES}
+            accept={config.upload.acceptedMimeTypes}
           />
         </label>
       </Card>
diff --git a/lib/auth.ts b/lib/auth.ts
index 335b248..352f883 100644
--- a/lib/auth.ts
+++ b/lib/auth.ts
@@ -1,6 +1,6 @@
-import { AUTH_LOGIN_URL, IS_SELF_HOSTED_MODE, SELF_HOSTED_REDIRECT_URL } from "@/lib/constants"
+import config from "@/lib/config"
 import { createUserDefaults } from "@/models/defaults"
-import { getSelfHostedUser, getUserByEmail } from "@/models/users"
+import { getSelfHostedUser } from "@/models/users"
 import { User } from "@prisma/client"
 import { betterAuth } from "better-auth"
 import { prismaAdapter } from "better-auth/adapters/prisma"
@@ -22,7 +22,7 @@ export const auth = betterAuth({
   database: prismaAdapter(prisma, { provider: "postgresql" }),
   email: {
     provider: "resend",
-    from: process.env.RESEND_FROM_EMAIL!,
+    from: config.email.from,
     resend,
   },
   session: {
@@ -49,14 +49,10 @@ export const auth = betterAuth({
   },
   plugins: [
     emailOTP({
-      disableSignUp: true,
+      disableSignUp: config.auth.disableSignup,
       otpLength: 6,
       expiresIn: 10 * 60, // 10 minutes
       sendVerificationOTP: async ({ email, otp }) => {
-        const user = await getUserByEmail(email as string)
-        if (!user) {
-          throw new Error("User with this email does not exist")
-        }
         await sendOTPCodeEmail({ email, otp })
       },
     }),
@@ -65,7 +61,7 @@ export const auth = betterAuth({
 })
 
 export async function getSession() {
-  if (IS_SELF_HOSTED_MODE) {
+  if (config.selfHosted.isEnabled) {
     const user = await getSelfHostedUser()
     return user ? { user } : null
   }
@@ -78,10 +74,10 @@ export async function getSession() {
 export async function getCurrentUser(): Promise<User> {
   const session = await getSession()
   if (!session || !session.user) {
-    if (IS_SELF_HOSTED_MODE) {
-      redirect(SELF_HOSTED_REDIRECT_URL)
+    if (config.selfHosted.isEnabled) {
+      redirect(config.selfHosted.redirectUrl)
     } else {
-      redirect(AUTH_LOGIN_URL)
+      redirect(config.auth.loginUrl)
     }
   }
   return session.user as User
diff --git a/lib/config.ts b/lib/config.ts
new file mode 100644
index 0000000..8e5f199
--- /dev/null
+++ b/lib/config.ts
@@ -0,0 +1,26 @@
+const config = {
+  app: {
+    title: "TaxHacker",
+    description: "Your personal AI accountant",
+    version: process.env.npm_package_version || "0.0.1",
+  },
+  upload: {
+    acceptedMimeTypes: "image/*,.pdf,.doc,.docx,.xls,.xlsx",
+  },
+  selfHosted: {
+    isEnabled: process.env.SELF_HOSTED_MODE === "true",
+    redirectUrl: "/self-hosted/redirect",
+    welcomeUrl: "/self-hosted",
+  },
+  auth: {
+    loginUrl: "/enter",
+    disableSignup: process.env.DISABLE_SIGNUP === "true" || process.env.SELF_HOSTED_MODE === "true",
+  },
+  email: {
+    apiKey: process.env.RESEND_API_KEY || "",
+    from: process.env.RESEND_FROM_EMAIL || "",
+    audienceId: process.env.RESEND_AUDIENCE_ID || "",
+  },
+}
+
+export default config
diff --git a/lib/constants.ts b/lib/constants.ts
deleted file mode 100644
index 091cad3..0000000
--- a/lib/constants.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-export const APP_TITLE = "TaxHacker"
-export const APP_DESCRIPTION = "Your personal AI accountant"
-export const FILE_ACCEPTED_MIMETYPES = "image/*,.pdf,.doc,.docx,.xls,.xlsx"
-export const IS_SELF_HOSTED_MODE = process.env.SELF_HOSTED_MODE === "true"
-export const SELF_HOSTED_REDIRECT_URL = "/self-hosted/redirect"
-export const SELF_HOSTED_WELCOME_URL = "/self-hosted"
-export const AUTH_LOGIN_URL = "/enter"
diff --git a/lib/currency-scraper.ts b/lib/currency-scraper.ts
index e609f9d..4b2712a 100644
--- a/lib/currency-scraper.ts
+++ b/lib/currency-scraper.ts
@@ -27,9 +27,6 @@ export async function getCurrencyRate(currencyCodeFrom: string, currencyCodeTo:
 export async function fetchHistoricalCurrencyRates(currency: string = "USD", date: Date): Promise<HistoricRate[]> {
   const formattedDate = format(date, "yyyy-MM-dd")
 
-  console.log("DATE", formattedDate)
-  console.log("QUERY", encodeURIComponent(`https://www.xe.com/currencytables/?from=${currency}&date=${formattedDate}`))
-
   const url = `https://corsproxy.io/?url=${encodeURIComponent(
     `https://www.xe.com/currencytables/?from=${currency}&date=${formattedDate}`
   )}`
diff --git a/lib/email.ts b/lib/email.ts
index 2fac423..38ce551 100644
--- a/lib/email.ts
+++ b/lib/email.ts
@@ -2,14 +2,15 @@ import { NewsletterWelcomeEmail } from "@/components/emails/newsletter-welcome-e
 import { OTPEmail } from "@/components/emails/otp-email"
 import React from "react"
 import { Resend } from "resend"
+import config from "./config"
 
-export const resend = new Resend(process.env.RESEND_API_KEY)
+export const resend = new Resend(config.email.apiKey)
 
 export async function sendOTPCodeEmail({ email, otp }: { email: string; otp: string }) {
   const html = React.createElement(OTPEmail, { otp })
 
   return await resend.emails.send({
-    from: process.env.RESEND_FROM_EMAIL!,
+    from: config.email.from,
     to: email,
     subject: "Your TaxHacker verification code",
     react: html,
@@ -20,7 +21,7 @@ export async function sendNewsletterWelcomeEmail(email: string) {
   const html = React.createElement(NewsletterWelcomeEmail)
 
   return await resend.emails.send({
-    from: process.env.RESEND_FROM_EMAIL as string,
+    from: config.email.from,
     to: email,
     subject: "Welcome to TaxHacker Newsletter!",
     react: html,
diff --git a/middleware.ts b/middleware.ts
index 0877f23..1bfee86 100644
--- a/middleware.ts
+++ b/middleware.ts
@@ -1,15 +1,15 @@
+import { default as globalConfig } from "@/lib/config"
 import { getSessionCookie } from "better-auth/cookies"
 import { NextRequest, NextResponse } from "next/server"
-import { AUTH_LOGIN_URL, IS_SELF_HOSTED_MODE } from "./lib/constants"
 
 export default async function middleware(request: NextRequest) {
-  if (IS_SELF_HOSTED_MODE) {
+  if (globalConfig.selfHosted.isEnabled) {
     return NextResponse.next()
   }
 
   const sessionCookie = getSessionCookie(request, { cookiePrefix: "taxhacker" })
   if (!sessionCookie) {
-    return NextResponse.redirect(new URL(AUTH_LOGIN_URL, request.url))
+    return NextResponse.redirect(new URL(globalConfig.auth.loginUrl, request.url))
   }
   return NextResponse.next()
 }
diff --git a/models/backups.ts b/models/backups.ts
index 5a7085c..48a9c73 100644
--- a/models/backups.ts
+++ b/models/backups.ts
@@ -3,8 +3,8 @@ import { prisma } from "@/lib/db"
 type BackupSetting = {
   filename: string
   model: any
-  recordToBackup: (userId: string, row: any) => Record<string, any>
-  backupToRecord: (userId: string, json: Record<string, any>) => any
+  backup: (userId: string, row: any) => Record<string, any>
+  restore: (userId: string, json: Record<string, any>) => any
 }
 
 // Ordering is important here
@@ -12,7 +12,7 @@ export const MODEL_BACKUP: BackupSetting[] = [
   {
     filename: "settings.json",
     model: prisma.setting,
-    recordToBackup: (userId: string, row: any) => {
+    backup: (userId: string, row: any) => {
       return {
         id: row.id,
         code: row.code,
@@ -21,9 +21,8 @@ export const MODEL_BACKUP: BackupSetting[] = [
         value: row.value,
       }
     },
-    backupToRecord: (userId: string, json: any) => {
+    restore: (userId: string, json: any) => {
       return {
-        id: json.id,
         code: json.code,
         name: json.name,
         description: json.description,
@@ -39,16 +38,15 @@ export const MODEL_BACKUP: BackupSetting[] = [
   {
     filename: "currencies.json",
     model: prisma.currency,
-    recordToBackup: (userId: string, row: any) => {
+    backup: (userId: string, row: any) => {
       return {
         id: row.id,
         code: row.code,
         name: row.name,
       }
     },
-    backupToRecord: (userId: string, json: any) => {
+    restore: (userId: string, json: any) => {
       return {
-        id: json.id,
         code: json.code,
         name: json.name,
         user: {
@@ -62,7 +60,7 @@ export const MODEL_BACKUP: BackupSetting[] = [
   {
     filename: "categories.json",
     model: prisma.category,
-    recordToBackup: (userId: string, row: any) => {
+    backup: (userId: string, row: any) => {
       return {
         id: row.id,
         code: row.code,
@@ -72,9 +70,8 @@ export const MODEL_BACKUP: BackupSetting[] = [
         createdAt: row.createdAt,
       }
     },
-    backupToRecord: (userId: string, json: any) => {
+    restore: (userId: string, json: any) => {
       return {
-        id: json.id,
         code: json.code,
         name: json.name,
         color: json.color,
@@ -91,7 +88,7 @@ export const MODEL_BACKUP: BackupSetting[] = [
   {
     filename: "projects.json",
     model: prisma.project,
-    recordToBackup: (userId: string, row: any) => {
+    backup: (userId: string, row: any) => {
       return {
         id: row.id,
         code: row.code,
@@ -101,9 +98,8 @@ export const MODEL_BACKUP: BackupSetting[] = [
         createdAt: row.createdAt,
       }
     },
-    backupToRecord: (userId: string, json: any) => {
+    restore: (userId: string, json: any) => {
       return {
-        id: json.id,
         code: json.code,
         name: json.name,
         color: json.color,
@@ -120,7 +116,7 @@ export const MODEL_BACKUP: BackupSetting[] = [
   {
     filename: "fields.json",
     model: prisma.field,
-    recordToBackup: (userId: string, row: any) => {
+    backup: (userId: string, row: any) => {
       return {
         id: row.id,
         code: row.code,
@@ -134,9 +130,8 @@ export const MODEL_BACKUP: BackupSetting[] = [
         isExtra: row.isExtra,
       }
     },
-    backupToRecord: (userId: string, json: any) => {
+    restore: (userId: string, json: any) => {
       return {
-        id: json.id,
         code: json.code,
         name: json.name,
         type: json.type,
@@ -157,7 +152,7 @@ export const MODEL_BACKUP: BackupSetting[] = [
   {
     filename: "files.json",
     model: prisma.file,
-    recordToBackup: (userId: string, row: any) => {
+    backup: (userId: string, row: any) => {
       return {
         id: row.id,
         filename: row.filename,
@@ -168,7 +163,7 @@ export const MODEL_BACKUP: BackupSetting[] = [
         createdAt: row.createdAt,
       }
     },
-    backupToRecord: (userId: string, json: any) => {
+    restore: (userId: string, json: any) => {
       return {
         id: json.id,
         filename: json.filename,
@@ -187,7 +182,7 @@ export const MODEL_BACKUP: BackupSetting[] = [
   {
     filename: "transactions.json",
     model: prisma.transaction,
-    recordToBackup: (userId: string, row: any) => {
+    backup: (userId: string, row: any) => {
       return {
         id: row.id,
         name: row.name,
@@ -209,7 +204,7 @@ export const MODEL_BACKUP: BackupSetting[] = [
         text: row.text,
       }
     },
-    backupToRecord: (userId: string, json: any) => {
+    restore: (userId: string, json: any) => {
       return {
         id: json.id,
         name: json.name,
@@ -244,21 +239,25 @@ export const MODEL_BACKUP: BackupSetting[] = [
   },
 ]
 
-export async function modelToJSON(userId: string, backup: BackupSetting): Promise<string> {
-  const data = await backup.model.findMany({ where: { userId } })
+export async function modelToJSON(userId: string, backupSettings: BackupSetting): Promise<string> {
+  const data = await backupSettings.model.findMany({ where: { userId } })
 
   if (!data || data.length === 0) {
     return "[]"
   }
 
   return JSON.stringify(
-    data.map((row: any) => backup.recordToBackup(userId, row)),
+    data.map((row: any) => backupSettings.backup(userId, row)),
     null,
     2
   )
 }
 
-export async function modelFromJSON(userId: string, backup: BackupSetting, jsonContent: string): Promise<number> {
+export async function modelFromJSON(
+  userId: string,
+  backupSettings: BackupSetting,
+  jsonContent: string
+): Promise<number> {
   if (!jsonContent) return 0
 
   try {
@@ -273,8 +272,8 @@ export async function modelFromJSON(userId: string, backup: BackupSetting, jsonC
       const record = preprocessRowData(rawRecord)
 
       try {
-        const data = await backup.backupToRecord(userId, record)
-        await backup.model.create({ data })
+        const data = await backupSettings.restore(userId, record)
+        await backupSettings.model.create({ data })
       } catch (error) {
         console.error(`Error importing record:`, error)
       }