feat: Add complete Docker containerization for v4

Production & Development Setup:
- Multi-stage Dockerfile with optimized build (node:20-alpine)
- docker-compose.yml for production with PostgreSQL
- docker-compose.dev.yml for development with hot reload
- Dockerfile.dev for development environment
- .dockerignore to reduce build context

Features:
- Health checks for both app and database
- Non-root user security (nextjs:nodejs)
- Resource limits (CPU/memory)
- Volume persistence for logs and database
- PostgreSQL 16 with automatic initialization
- Network isolation with custom bridge network

Helper Scripts:
- docker-build.sh - Build production image
- docker-start.sh - Start all services
- docker-stop.sh - Stop containers safely
- docker-logs.sh - View real-time logs

Documentation:
- DOCKER.md - Complete deployment guide with:
  * Quick start commands
  * Production deployment steps
  * Development hot reload setup
  * Configuration examples
  * Docker commands reference
  * Troubleshooting guide
  * Best practices for security & performance

Configuration:
- Environment-based configuration via .env
- Safe defaults for testing ($50 positions)
- Separate dev/prod compose files
- Debug mode with Node.js inspector (port 9229)
- Log rotation and resource monitoring

Ready for deployment with:
  cd v4 && ./docker-start.sh

v4/docker-compose.dev.yml

@@ -0,0 +1,66 @@
+# Trading Bot v4 - Development Docker Compose
+# Hot reload enabled, debug logging, no database required
+
+version: '3.9'
+
+services:
+  # ================================
+  # Trading Bot (Development)
+  # ================================
+  trading-bot-dev:
+    build:
+      context: ..
+      dockerfile: v4/Dockerfile.dev
+      args:
+        NODE_ENV: development
+    container_name: trading-bot-v4-dev
+    restart: unless-stopped
+    ports:
+      - "3001:3000"  # Use different port to avoid conflicts
+      - "9229:9229"  # Node.js debugger
+    environment:
+      NODE_ENV: development
+      PORT: 3000
+      LOG_LEVEL: debug
+      DEBUG: "*"
+      
+      # Load from .env file
+      DRIFT_WALLET_PRIVATE_KEY: ${DRIFT_WALLET_PRIVATE_KEY}
+      DRIFT_ENV: ${DRIFT_ENV:-devnet}  # Use devnet by default in development
+      API_SECRET_KEY: ${API_SECRET_KEY:-dev-secret-key}
+      SOLANA_RPC_URL: ${SOLANA_RPC_URL}
+      PYTH_HERMES_URL: ${PYTH_HERMES_URL:-https://hermes.pyth.network}
+      
+      # Safe defaults for development
+      MAX_POSITION_SIZE_USD: ${MAX_POSITION_SIZE_USD:-10}
+      LEVERAGE: ${LEVERAGE:-10}
+      DRY_RUN: ${DRY_RUN:-true}  # Dry run by default in dev
+      
+      # Notifications (optional in dev)
+      TELEGRAM_BOT_TOKEN: ${TELEGRAM_BOT_TOKEN:-}
+      TELEGRAM_CHAT_ID: ${TELEGRAM_CHAT_ID:-}
+    
+    volumes:
+      # Hot reload - mount source code
+      - ..:/app:cached
+      - /app/node_modules
+      - /app/.next
+      
+      # Mount logs
+      - ./logs:/app/logs
+    
+    networks:
+      - trading-net-dev
+    
+    command: npm run dev
+    
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:3000/api/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 60s
+
+networks:
+  trading-net-dev:
+    driver: bridge