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
- Add missing VITE_API_URL to production frontend
- Fix GitHub Actions to use correct go.sum path
- Clean up development directories and unused files

.env.example

@@ -1,27 +1,51 @@
 # Server Configuration
 FRONTEND_PORT=3000
-BACKEND_PORT=8080
-DB_PORT=5432
-DRAGONFLY_PORT=6379
+BACKEND_PORT=9000
 GIN_MODE=debug
 
+# Demo Mode Configuration
+# Set to true for demo mode (read-only with demo data)
+# Set to false for normal mode (full functionality)
+VITE_DEMO_MODE=true
+VITE_API_URL=http://localhost:9000
+FRONTEND_URL=http://localhost:3000
+OAUTH_SERVICE_URL=https://oauth.trackeep.org
+VITE_OAUTH_SERVICE_URL=https://oauth.trackeep.org
+
 # Database Configuration
 DB_TYPE=postgres
 DB_HOST=localhost
-DB_PORT=5432
+DB_PORT=5433
 DB_USER=trackeep
 DB_PASSWORD=your_password_here
 DB_NAME=trackeep
 DB_SSL_MODE=disable
 
 # DragonflyDB Configuration
-DRAGONFLY_ADDR=dragonfly:6379
+DRAGONFLY_ADDR=dragonfly:6380
+DRAGONFLY_PORT=6380
 DRAGONFLY_PASSWORD=your_dragonfly_password_here
 
 # JWT Configuration (also used for encryption)
+# Generate a secure 64-character hex string using: openssl rand -hex 32
 JWT_SECRET=your_jwt_secret_here_64_hex_characters_long_exactly
+# Token expiration time (e.g., 24h, 1h, 30m, 7d)
 JWT_EXPIRES_IN=24h
 
+# GitHub OAuth App Configuration
+GITHUB_CLIENT_ID=your_github_client_id_here
+GITHUB_CLIENT_SECRET=your_github_client_secret_here
+GITHUB_REDIRECT_URL=http://localhost:9000/api/v1/auth/github/callback
+
+# GitHub App Configuration (for repository installation + backups)
+# App installation callback should point to:
+# http://localhost:9000/api/v1/github/app/callback
+GITHUB_APP_SLUG=trackeep
+GITHUB_APP_ID=123456
+GITHUB_APP_PRIVATE_KEY="-----BEGIN RSA PRIVATE KEY-----\n...\n-----END RSA PRIVATE KEY-----"
+GITHUB_BACKUP_ROOT=./data/github-backups
+GITHUB_BACKUP_TIMEOUT=10m
+
 # File Upload Configuration
 UPLOAD_DIR=./uploads
 MAX_FILE_SIZE=10485760
@@ -29,13 +53,6 @@ MAX_FILE_SIZE=10485760
 # CORS Configuration
 CORS_ALLOWED_ORIGINS=*
 
-# Demo Mode Configuration
-VITE_DEMO_MODE=false
-
-# AI Services Configuration
-SEARCH_API_PROVIDER=demo
-SEARCH_RESULTS_LIMIT=10
-
 # Auto Update Configuration
 AUTO_UPDATE_CHECK=false
 UPDATE_CHECK_INTERVAL=24h