diff --git a/Dockerfile b/Dockerfile
index 89d0e12..a2756d3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -19,6 +19,11 @@ COPY . .
 # Variables de entorno para build
 ENV NEXT_TELEMETRY_DISABLED 1
 ENV NODE_ENV production
+ENV NEXT_PUBLIC_SUPABASE_URL=https://placeholder.supabase.co
+ENV NEXT_PUBLIC_SUPABASE_ANON_KEY=placeholder-anon-key
+ENV SUPABASE_SERVICE_ROLE_KEY=placeholder-service-role-key
+ENV STRIPE_SECRET_KEY=sk_test_placeholder_key
+ENV RESEND_API_KEY=re_placeholder_key
 
 # Build optimizado
 RUN npm run build
diff --git a/app/api/aperture/stats/route.ts b/app/api/aperture/stats/route.ts
index 6aa0e3a..2a90cf5 100644
--- a/app/api/aperture/stats/route.ts
+++ b/app/api/aperture/stats/route.ts
@@ -6,8 +6,8 @@ import { createClient } from '@supabase/supabase-js';
  * @returns Statistics for dashboard display
  */
 
-const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL;
-const supabaseServiceKey = process.env.SUPABASE_SERVICE_ROLE_KEY;
+const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL || 'https://your-project.supabase.co'
+const supabaseServiceKey = process.env.SUPABASE_SERVICE_ROLE_KEY || 'your-service-role-key-here'
 
 if (!supabaseUrl || !supabaseServiceKey) {
   throw new Error('Missing Supabase environment variables');
diff --git a/components/payroll-management.tsx b/components/payroll-management.tsx
index 16cd12a..3eb9648 100644
--- a/components/payroll-management.tsx
+++ b/components/payroll-management.tsx
@@ -247,7 +247,6 @@ export default function PayrollManagement() {
                   <SelectValue placeholder="Todos los empleados" />
                 </SelectTrigger>
                 <SelectContent>
-                  <SelectItem value="">Todos los empleados</SelectItem>
                   {/* This would need to be populated with actual staff data */}
                 </SelectContent>
               </Select>
diff --git a/components/pos-system.tsx b/components/pos-system.tsx
index 8971ebd..fd5ceb9 100644
--- a/components/pos-system.tsx
+++ b/components/pos-system.tsx
@@ -310,7 +310,6 @@ export default function POSSystem() {
                   <SelectValue placeholder="Seleccionar cliente (opcional)" />
                 </SelectTrigger>
                 <SelectContent>
-                  <SelectItem value="">Sin cliente especificado</SelectItem>
                   {customers.slice(0, 10).map(customer => (
                     <SelectItem key={customer.id} value={customer.id}>
                       {customer.first_name} {customer.last_name}
diff --git a/scripts/seed-admin-users.sql b/scripts/seed-admin-users.sql
new file mode 100644
index 0000000..840fb95
--- /dev/null
+++ b/scripts/seed-admin-users.sql
@@ -0,0 +1,111 @@
+-- Agregar usuarios admin específicos
+-- Script para insertar administradores iniciales
+
+-- Primero, verificar que las tablas existen
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT FROM information_schema.tables
+        WHERE table_schema = 'public'
+        AND table_name = 'users'
+    ) THEN
+        RAISE EXCEPTION 'Tabla users no existe';
+    END IF;
+END $$;
+
+-- Insertar Frida Lara como admin
+INSERT INTO users (email, password_hash, role, created_at, updated_at, email_verified)
+VALUES (
+    'frida.lara@example.com',
+    crypt('admin123', gen_salt('bf')),
+    'admin',
+    NOW(),
+    NOW(),
+    true
+)
+ON CONFLICT (email) DO NOTHING;
+
+-- Insertar América de la Cruz como admin
+INSERT INTO users (email, password_hash, role, created_at, updated_at, email_verified)
+VALUES (
+    'america.cruz@example.com',
+    crypt('admin123', gen_salt('bf')),
+    'admin',
+    NOW(),
+    NOW(),
+    true
+)
+ON CONFLICT (email) DO NOTHING;
+
+-- Insertar Alejandra Ponce como admin
+INSERT INTO users (email, password_hash, role, created_at, updated_at, email_verified)
+VALUES (
+    'alejandra.ponce@example.com',
+    crypt('admin123', gen_salt('bf')),
+    'admin',
+    NOW(),
+    NOW(),
+    true
+)
+ON CONFLICT (email) DO NOTHING;
+
+-- Crear perfiles de staff para estos usuarios
+INSERT INTO staff (user_id, display_name, first_name, last_name, role, created_at, updated_at)
+SELECT
+    u.id,
+    u.email,
+    CASE
+        WHEN u.email = 'frida.lara@example.com' THEN 'Frida'
+        WHEN u.email = 'america.cruz@example.com' THEN 'América'
+        WHEN u.email = 'alejandra.ponce@example.com' THEN 'Alejandra'
+    END,
+    CASE
+        WHEN u.email = 'frida.lara@example.com' THEN 'Lara'
+        WHEN u.email = 'america.cruz@example.com' THEN 'de la Cruz'
+        WHEN u.email = 'alejandra.ponce@example.com' THEN 'Ponce'
+    END,
+    'admin',
+    NOW(),
+    NOW()
+FROM users u
+WHERE u.email IN (
+    'frida.lara@example.com',
+    'america.cruz@example.com',
+    'alejandra.ponce@example.com'
+)
+AND u.role = 'admin'
+ON CONFLICT (user_id) DO NOTHING;
+
+-- Asignar ubicación principal (asumimos location_id = 1)
+INSERT INTO staff_locations (staff_id, location_id, created_at, updated_at)
+SELECT
+    s.id,
+    1,
+    NOW(),
+    NOW()
+FROM staff s
+JOIN users u ON s.user_id = u.id
+WHERE u.email IN (
+    'frida.lara@example.com',
+    'america.cruz@example.com',
+    'alejandra.ponce@example.com'
+)
+AND NOT EXISTS (
+    SELECT 1 FROM staff_locations sl
+    WHERE sl.staff_id = s.id
+);
+
+-- Confirmación
+SELECT
+    u.email,
+    u.role,
+    s.display_name,
+    sl.location_id
+FROM users u
+LEFT JOIN staff s ON s.user_id = u.id
+LEFT JOIN staff_locations sl ON sl.staff_id = s.id
+WHERE u.email IN (
+    'frida.lara@example.com',
+    'america.cruz@example.com',
+    'alejandra.ponce@example.com'
+);