feat: migrate to DragonflyDB and clean up environment configuration

- Replace Redis with DragonflyDB for better performance and memory efficiency
- Remove redundant environment variables (POSTGRES_*, ENCRYPTION_KEY, OAUTH_SERVICE_URL)
- Consolidate database configuration to use single DB_* variables
- Use JWT_SECRET for both JWT tokens and encryption
- Remove PORT variable redundancy, use BACKEND_PORT consistently
- Clean up docker-compose configurations for dev/prod consistency
- Add DragonflyDB configuration with optimized memory usage
- Remove redis.conf as it's no longer needed
- Update health checks to use Redis-compatible CLI for DragonflyDB

.env.example

@@ -1,10 +1,9 @@
 # Server Configuration
-PORT=8080
+FRONTEND_PORT=3000
+BACKEND_PORT=8080
+DB_PORT=5432
+DRAGONFLY_PORT=6379
 GIN_MODE=debug
-READ_TIMEOUT=15s
-WRITE_TIMEOUT=15s
-IDLE_TIMEOUT=60s
-SHUTDOWN_TIMEOUT=30s
 
 # Database Configuration
 DB_TYPE=postgres
@@ -15,24 +14,14 @@ DB_PASSWORD=your_password_here
 DB_NAME=trackeep
 DB_SSL_MODE=disable
 
-# Docker Compose Database (used by docker-compose.yml)
-POSTGRES_DB=trackeep
-POSTGRES_USER=trackeep
-POSTGRES_PASSWORD=your_secure_password_here
+# DragonflyDB Configuration
+DRAGONFLY_ADDR=dragonfly:6379
+DRAGONFLY_PASSWORD=your_dragonfly_password_here
 
-# JWT Configuration
-# JWT_SECRET is used for both JWT token signing and 2FA backup codes encryption
-# Must be exactly 64 hexadecimal characters (32 bytes when decoded)
-# Generate with: openssl rand -hex 32
-# Or with Node.js: node -e "console.log(require('crypto').randomBytes(32).toString('hex'))"
-# Or with Python: python3 -c "import secrets; print(secrets.token_hex(32))"
+# JWT Configuration (also used for encryption)
 JWT_SECRET=your_jwt_secret_here_64_hex_characters_long_exactly
 JWT_EXPIRES_IN=24h
 
-# Encryption Configuration
-# Now uses JWT_SECRET for encryption - no separate ENCRYPTION_KEY needed
-# This ensures 2FA backup codes are encrypted with the same key used for JWT tokens
-
 # File Upload Configuration
 UPLOAD_DIR=./uploads
 MAX_FILE_SIZE=10485760
@@ -44,65 +33,10 @@ CORS_ALLOWED_ORIGINS=*
 VITE_DEMO_MODE=false
 
 # AI Services Configuration
-# AI services are now configured only within the Trackeep application
-# No environment variables needed - configure tokens and settings in the app settings
+SEARCH_API_PROVIDER=demo
+SEARCH_RESULTS_LIMIT=10
 
-# =============================================================================
-# REDIS CONFIGURATION (Optional but Recommended)
-# =============================================================================
-# Redis provides caching, session storage, rate limiting, and real-time features
-# Uncomment and configure these to enable Redis support
-
-# REDIS_ADDR=redis:6379
-# REDIS_PASSWORD=your_secure_redis_password_here
-# REDIS_DB=0
-# REDIS_POOL_SIZE=20
-# REDIS_DIAL_TIMEOUT=5s
-# REDIS_READ_TIMEOUT=3s
-# REDIS_WRITE_TIMEOUT=3s
-
-# Feature Flags - Enable/disable Redis features
-# REDIS_SESSIONS_ENABLED=true
-# REDIS_CACHE_ENABLED=true
-# REDIS_RATELIMIT_ENABLED=true
-# REDIS_PUBSUB_ENABLED=true
-
-# Redis Memory Settings (for Docker Compose)
-# REDIS_MAXMEMORY=256mb
-# REDIS_MAXMEMORY_POLICY=allkeys-lru
-
-# =============================================================================
-# PERFORMANCE TUNING
-# =============================================================================
-# Enable these settings for better performance with Redis caching
-
-# Cache TTL settings (in seconds)
-# SEARCH_CACHE_TTL=300
-# ANALYTICS_CACHE_TTL=900
-# USER_CACHE_TTL=900
-# SESSION_CACHE_TTL=86400  # 24 hours
-
-# Rate limiting settings
-# RATE_LIMIT_REQUESTS_PER_MINUTE=100
-# RATE_LIMIT_BURST_SIZE=150
-# AI_RATE_LIMIT_REQUESTS_PER_MINUTE=20
-# UPLOAD_RATE_LIMIT_REQUESTS_PER_MINUTE=10
-
-# =============================================================================
-# NOTE: Redis Deployment
-# =============================================================================
-# To deploy with Redis, add the Redis service to your docker-compose.yml:
-#
-#   redis:
-#     image: redis:7-alpine
-#     restart: unless-stopped
-#     volumes:
-#       - redis_data:/data
-#       - ./redis.conf:/usr/local/etc/redis/redis.conf:ro
-#     command: redis-server /usr/local/etc/redis/redis.conf
-#     environment:
-#       - REDIS_PASSWORD=${REDIS_PASSWORD}
-#     networks:
-#       - trackeep-network
-#
-# And add to volumes: redis_data:
+# Auto Update Configuration
+AUTO_UPDATE_CHECK=false
+UPDATE_CHECK_INTERVAL=24h
+PRERELEASE_UPDATES=false