fix: configure PostgreSQL for production and clean up deployment

- Fix database configuration to use PostgreSQL in production
- Add knexfile.js to support both SQLite (dev) and PostgreSQL (prod)
- Create admin user creation script (scripts/create-admin.js)
- Clean up docker-compose files:
  - Remove redundant docker-compose.yml and docker-compose.local.yml
  - Create docker-compose.dev.yml for development
  - Update docker-compose.prod.yml with proper DB configuration
- Clean up environment files:
  - Update .env.example for development
  - Update .env.production.example with proper settings
  - Remove redundant .env.local
- Update backend .env.example with database configuration options
- Create comprehensive DEPLOYMENT.md with admin setup instructions
- Fix production database name consistency (picpeak instead of photoapp)

.env.production.example

@@ -1,60 +1,32 @@
+# Production Environment Configuration Template
+# Copy this file to .env and fill in your values
+
 # Application URLs
-FRONTEND_HOST=photos.yourdomain.com
-BACKEND_HOST=api.photos.yourdomain.com
-ADMIN_URL=https://admin.photos.yourdomain.com
-FRONTEND_URL=https://photos.yourdomain.com
+ADMIN_URL=https://yourdomain.com
+FRONTEND_URL=https://yourdomain.com
 
-# Database Configuration
-DB_NAME=photo_sharing
-DB_USER=photoapp
-DB_PASSWORD=your-secure-password-here
+# Security - CRITICAL: Generate a secure random JWT secret
+# You can generate one with: openssl rand -base64 32
+JWT_SECRET=your-secure-random-jwt-secret-here
 
-# JWT Configuration
-JWT_SECRET=your-jwt-secret-here
+# Database Configuration (PostgreSQL)
+DB_USER=picpeak
+DB_PASSWORD=your-secure-database-password
+DB_NAME=picpeak
 
 # Email Configuration
 SMTP_HOST=smtp.gmail.com
 SMTP_PORT=587
-SMTP_SECURE=false
+SMTP_SECURE=true
 SMTP_USER=your-email@gmail.com
 SMTP_PASS=your-app-password
 EMAIL_FROM=noreply@yourdomain.com
 
-# Umami Analytics
+# Umami Analytics (Optional)
 UMAMI_URL=https://analytics.yourdomain.com
-UMAMI_HOST=analytics.yourdomain.com
 UMAMI_WEBSITE_ID=your-website-id
-UMAMI_HASH_SALT=your-random-salt
-UMAMI_DB_PASSWORD=umami-db-password
+UMAMI_HASH_SALT=your-random-hash-salt
 
-# Traefik Configuration
-TRAEFIK_HOST=traefik.yourdomain.com
-ACME_EMAIL=admin@yourdomain.com
-TRAEFIK_DASHBOARD_AUTH=admin:$2y$10$... # Use htpasswd to generate
-
-# Docker Registry (optional)
-REGISTRY_URL=registry.yourdomain.com
-VERSION=latest
-
-# Monitoring
-DOMAIN=yourdomain.com
-GRAFANA_USER=admin
-GRAFANA_PASSWORD=your-grafana-password
-
-# OAuth Configuration (optional)
-OAUTH_AUTH_URL=https://auth.yourdomain.com/oauth2/auth
-OAUTH_TOKEN_URL=https://auth.yourdomain.com/oauth2/token
-OAUTH_USER_URL=https://auth.yourdomain.com/oauth2/userinfo
-OAUTH_CLIENT_ID=photo-sharing
-OAUTH_CLIENT_SECRET=your-oauth-secret
-OAUTH_SECRET=your-random-secret
-COOKIE_DOMAIN=.yourdomain.com
-OAUTH_WHITELIST=admin@yourdomain.com
-
-# Backup Configuration (optional)
-S3_BACKUP_BUCKET=your-backup-bucket
-
-# Drone CI Configuration
-DRONE_RPC_SECRET=your-drone-secret
-DRONE_GITHUB_CLIENT_ID=your-github-client-id
-DRONE_GITHUB_CLIENT_SECRET=your-github-client-secret
+# First Admin User (for initial setup)
+# Run: docker-compose exec backend node scripts/create-admin.js --email admin@yourdomain.com
+ADMIN_EMAIL=admin@yourdomain.com