Fix database configuration for simplified Dokploy setup

- Add docker-compose.dokploy-external-db.yml that matches quantum-digital exactly
- Uses external DATABASE_URL only (no db container)
- Fix docker-compose.dokploy-simple.yml to include database container with proper networking

Choose one approach:
- dokploy-external-db.yml: Use with external database (Neon, Supabase, etc.)
- dokploy-simple.yml: Use with Docker PostgreSQL container

The error 'could not translate host name db' is fixed in both versions.

docker-compose.dokploy-external-db.yml

@@ -0,0 +1,21 @@
+services:
+  web:
+    build: .
+    ports:
+      - "8000:8000"
+    environment:
+      - DEBUG=False
+      - ALLOWED_HOSTS=dt.netcoptech.com,localhost,127.0.0.1
+      - DATABASE_URL=${DATABASE_URL}
+      - SECRET_KEY=${SECRET_KEY}
+      - DJANGO_SETTINGS_MODULE=django_project.settings.production
+      - CSRF_TRUSTED_ORIGINS=https://dt.netcoptech.com
+      - SECURE_SSL_REDIRECT=True
+      - GOOGLE_OAUTH2_CLIENT_ID=${GOOGLE_OAUTH2_CLIENT_ID:-demo-google-client-id}
+      - GOOGLE_OAUTH2_CLIENT_SECRET=${GOOGLE_OAUTH2_CLIENT_SECRET:-demo-google-client-secret}
+    command: >
+      sh -c "python manage.py migrate &&
+             python manage.py create_groups &&
+             python manage.py setup_social_apps &&
+             python manage.py collectstatic --noinput &&
+             gunicorn --bind 0.0.0.0:8000 --workers 3 --timeout 120 django_project.wsgi:application"

docker-compose.dokploy-simple.yml

@@ -6,13 +6,35 @@ services:
     environment:
       - DEBUG=False
       - ALLOWED_HOSTS=dt.netcoptech.com,localhost,127.0.0.1
-      - DATABASE_URL=${DATABASE_URL}
-      - SECRET_KEY=${SECRET_KEY}
+      - DATABASE_URL=${DATABASE_URL:-postgresql://django_user:django_password@db:5432/django_db}
+      - SECRET_KEY=${SECRET_KEY:-django-insecure-change-this-key}
       - DJANGO_SETTINGS_MODULE=django_project.settings.production
       - CSRF_TRUSTED_ORIGINS=https://dt.netcoptech.com
       - SECURE_SSL_REDIRECT=True
       - GOOGLE_OAUTH2_CLIENT_ID=${GOOGLE_OAUTH2_CLIENT_ID:-demo-google-client-id}
       - GOOGLE_OAUTH2_CLIENT_SECRET=${GOOGLE_OAUTH2_CLIENT_SECRET:-demo-google-client-secret}
+    depends_on:
+      - db
+    networks:
+      - dokploy-network
+
+  db:
+    image: postgres:15-alpine
+    environment:
+      - POSTGRES_DB=django_db
+      - POSTGRES_USER=django_user
+      - POSTGRES_PASSWORD=django_password
+    volumes:
+      - postgres_data:/var/lib/postgresql/data/
+    networks:
+      - dokploy-network
+
+volumes:
+  postgres_data:
+
+networks:
+  dokploy-network:
+    external: true
     command: >
       sh -c "python manage.py migrate &&
              python manage.py create_groups &&