fix: set baseURL for production deploy

lib/auth.ts

@@ -21,6 +21,7 @@ export type UserProfile = {
 export const auth = betterAuth({
   database: prismaAdapter(prisma, { provider: "postgresql" }),
   appName: config.app.title,
+  baseURL: config.app.baseURL,
   secret: config.auth.secret,
   email: {
     provider: "resend",