refactor: simplify deployment structure with direct port exposure

- Removed nginx/certbot/umami from docker-compose.yml
- Services now expose ports directly (frontend:3000, backend:3001)
- Updated deployment guide with reverse proxy setup instructions
- Changed all docker-compose commands to use docker compose (no hyphen)
- Removed separate dev deployment files (.env.dev, docker-compose.dev.yml)
- Simplified .env.example for production use
- Added comprehensive reverse proxy examples (nginx, Traefik, Caddy)

BREAKING CHANGE: Deployment now requires external reverse proxy for SSL/HTTPS

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.env.example

@@ -1,65 +1,50 @@
-# PicPeak Development Environment Configuration
-# Copy this file to .env for local development
+# PicPeak Environment Configuration
+# Copy this file to .env and update with your values
 
-# SECURITY WARNING: This configuration is for development only!
-# For production, use .env.production.example
+# Environment
+NODE_ENV=production
 
-# JWT Secret (Change in production!)
-# Generate secure secret with: openssl rand -base64 32
-JWT_SECRET=dev-secret-DO-NOT-USE-IN-PRODUCTION
+# JWT Secret (generate with: openssl rand -base64 64)
+JWT_SECRET=your_very_long_random_jwt_secret_here
 
-# Application URLs (Docker Compose development setup)
-ADMIN_URL=http://localhost:3005
-FRONTEND_URL=http://localhost:3005
-BACKEND_URL=http://localhost:3001
-
-# Database Configuration (PostgreSQL for development)
+# Database Configuration (PostgreSQL)
 DATABASE_CLIENT=pg
-DB_HOST=db
-DB_PORT=5432
-DB_NAME=picpeak
 DB_USER=picpeak
-DB_PASSWORD=picpeak
+DB_PASSWORD=your_secure_postgres_password_here
+DB_NAME=picpeak_prod
+
+# Redis Configuration
+REDIS_PASSWORD=your_secure_redis_password_here
+
+# Admin Account (initial setup)
+ADMIN_USERNAME=admin
+ADMIN_EMAIL=admin@yourdomain.com
 
 # Email Configuration
-# For development with docker-compose.dev.yml:
-# Access Mailhog UI at: http://localhost:8025
-SMTP_HOST=mailhog
-SMTP_PORT=1025
+# For Gmail: use app-specific password
+# For SendGrid: SMTP_USER=apikey, SMTP_PASS=your-api-key
+SMTP_HOST=smtp.gmail.com
+SMTP_PORT=587
 SMTP_SECURE=false
-SMTP_USER=
-SMTP_PASS=
-EMAIL_FROM=noreply@localhost
+SMTP_USER=your-email@gmail.com
+SMTP_PASS=your-app-specific-password
+EMAIL_FROM=noreply@yourdomain.com
 
-# For development without Docker, use real SMTP:
-# SMTP_HOST=smtp.gmail.com
-# SMTP_PORT=587
-# SMTP_SECURE=false
-# SMTP_USER=your-email@gmail.com
-# SMTP_PASS=your-app-password
-# EMAIL_FROM=PicPeak Dev <your-email@gmail.com>
+# Application URLs
+FRONTEND_URL=https://yourdomain.com
+ADMIN_URL=https://yourdomain.com:3001
+VITE_API_URL=https://yourdomain.com:3001/api
 
-# Backend Port Configuration
-PORT=3001
+# Port Configuration (optional)
+# BACKEND_PORT=3001
+# FRONTEND_PORT=3000
+# DB_PORT=5432
+# REDIS_PORT=6379
 
-# Optional: Umami Analytics Backend Config
-# NOTE: Primary configuration through Admin UI > Settings > Analytics
-# These are fallback values for server-side tracking
-# UMAMI_URL=https://analytics.example.com
-# UMAMI_WEBSITE_ID=your-website-id
-# UMAMI_HASH_SALT=your-hash-salt
+# Timezone
+TZ=UTC
 
-# Development Features
-NODE_ENV=development
-LOG_LEVEL=debug
-
-# Storage Settings (optional)
-DEFAULT_EXPIRATION_DAYS=30
-WARNING_DAYS_BEFORE_EXPIRY=7
-
-# Admin Setup Notes:
-# 1. Run 'docker-compose -f docker-compose.dev.yml up -d'
-# 2. Run 'docker-compose -f docker-compose.dev.yml exec backend npm run migrate'
-# 3. Admin credentials will be auto-generated
-# 4. Check backend/ADMIN_CREDENTIALS.txt for login details
-# 5. Change password on first login (required)
+# Analytics (Optional - Umami)
+VITE_UMAMI_URL=
+VITE_UMAMI_WEBSITE_ID=
+VITE_UMAMI_SHARE_URL=