Backend Complete: Interface Refactoring & Service Container Enhancements

Repository Interface Optimization:
- Created IBaseRepository.ts and IPaginatedRepository.ts
- Refactored all 7 repository interfaces to extend base interfaces
- Eliminated ~200 lines of redundant code (70% reduction)
- Improved type safety and maintainability

 Dependency Injection Improvements:
- Added EmailService and GameTokenService to DIContainer
- Updated CreateUserCommandHandler constructor for DI
- Updated RequestPasswordResetCommandHandler constructor for DI
- Enhanced testability and service consistency

 Environment Configuration:
- Created comprehensive .env.example with 40+ variables
- Organized into 12 logical sections (Database, Security, Email, etc.)
- Added security guidelines and best practices
- Documented all backend environment requirements

 Documentation:
- Added comprehensive codebase review
- Created refactoring summary report
- Added frontend implementation guide

Impact: Improved code quality, reduced maintenance overhead, enhanced developer experience

SerpentRace_Docker/docker-compose.prod.yml

@@ -0,0 +1,161 @@
+version: '3.8'
+
+services:
+  # Backend service
+  backend:
+    build:
+      context: ../SerpentRace_Backend
+      dockerfile: ../SerpentRace_Docker/Dockerfile_backend
+    container_name: serpentrace-backend
+    restart: unless-stopped
+    env_file:
+      - .env.prod
+    ports:
+      - "3000:3000"
+    environment:
+      - NODE_ENV=production
+      - PORT=3000
+      - DB_HOST=postgres
+      - DB_PORT=5432
+      - DB_NAME=serpentrace
+      - DB_USERNAME=postgres
+      - DB_PASSWORD=${DB_PASSWORD}
+      - REDIS_URL=redis://redis:6379
+      - REDIS_HOST=redis
+      - REDIS_PORT=6379
+      - JWT_SECRET=${JWT_SECRET}
+      - JWT_EXPIRATION=${JWT_EXPIRATION:-24h}
+      - JWT_REFRESH_EXPIRATION=${JWT_REFRESH_EXPIRATION:-7d}
+      - MINIO_ENDPOINT=minio
+      - MINIO_PORT=9000
+      - MINIO_ACCESS_KEY=${MINIO_ACCESS_KEY}
+      - MINIO_SECRET_KEY=${MINIO_SECRET_KEY}
+      - MINIO_USE_SSL=false
+      - MINIO_BUCKET_NAME=${MINIO_BUCKET_NAME:-serpentrace-logs}
+      - EMAIL_HOST=${EMAIL_HOST}
+      - EMAIL_PORT=${EMAIL_PORT}
+      - EMAIL_SECURE=${EMAIL_SECURE}
+      - EMAIL_USER=${EMAIL_USER}
+      - EMAIL_PASS=${EMAIL_PASS}
+      - EMAIL_FROM=${EMAIL_FROM}
+      - APP_BASE_URL=${APP_BASE_URL:-http://localhost:3000}
+      - CHAT_INACTIVITY_TIMEOUT_MINUTES=${CHAT_INACTIVITY_TIMEOUT_MINUTES:-30}
+      - CHAT_MAX_MESSAGES_PER_USER=${CHAT_MAX_MESSAGES_PER_USER:-100}
+      - CHAT_MESSAGE_CLEANUP_WEEKS=${CHAT_MESSAGE_CLEANUP_WEEKS:-4}
+      - MAX_LOGS_PER_FILE=${MAX_LOGS_PER_FILE:-10000}
+    volumes:
+      - logs-data:/app/logs
+    depends_on:
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
+      minio:
+        condition: service_healthy
+    networks:
+      - serpentrace-network
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:3000/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 40s
+
+  # Frontend service with nginx
+  frontend:
+    build:
+      context: ../SerpentRace_Frontend
+      dockerfile: ../SerpentRace_Docker/Dockerfile_frontend
+    container_name: serpentrace-frontend
+    restart: unless-stopped
+    ports:
+      - "80:80"
+    depends_on:
+      - backend
+    networks:
+      - serpentrace-network
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+  # PostgreSQL Database
+  postgres:
+    image: postgres:15-alpine
+    container_name: serpentrace-postgres
+    restart: unless-stopped
+    env_file:
+      - .env.prod
+    ports:
+      - "5432:5432"
+    environment:
+      POSTGRES_DB: serpentrace
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_INITDB_ARGS: "--encoding=UTF-8"
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    networks:
+      - serpentrace-network
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+  # Redis Cache
+  redis:
+    image: redis:7-alpine
+    container_name: serpentrace-redis
+    restart: unless-stopped
+    ports:
+      - "6379:6379"
+    volumes:
+      - redis_data:/data
+    command: redis-server --appendonly yes
+    networks:
+      - serpentrace-network
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+  # MinIO Object Storage
+  minio:
+    image: minio/minio:latest
+    container_name: serpentrace-minio
+    restart: unless-stopped
+    env_file:
+      - .env.prod
+    ports:
+      - "9000:9000"
+      - "9001:9001"
+    environment:
+      MINIO_ROOT_USER: ${MINIO_ACCESS_KEY}
+      MINIO_ROOT_PASSWORD: ${MINIO_SECRET_KEY}
+    volumes:
+      - minio_data:/data
+    command: server /data --console-address ":9001"
+    networks:
+      - serpentrace-network
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:9000/minio/health/live"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+volumes:
+  postgres_data:
+    driver: local
+  redis_data:
+    driver: local
+  minio_data:
+    driver: local
+  logs-data:
+    driver: local
+
+networks:
+  serpentrace-network:
+    driver: bridge