refactor: remove CloudWatch monitoring integration

Author: rui-typelets

Dockerfile

@@ -38,13 +38,7 @@ RUN pnpm install --frozen-lockfile --prod
 
 # Copy built application from builder stage
 COPY --from=builder /app/dist ./dist
-COPY newrelic.js ./
-
-# Set New Relic environment variables
-ENV NEW_RELIC_NO_CONFIG_FILE=false
-ENV NEW_RELIC_DISTRIBUTED_TRACING_ENABLED=true
-ENV NEW_RELIC_LOG=stdout
-ENV NEW_RELIC_LOG_LEVEL=info
+# Application configuration complete
 
 # Change ownership to non-root user
 RUN chown -R typelets:nodejs /app
@@ -53,9 +47,9 @@ USER typelets
 # Expose port
 EXPOSE 3000
 
-# Health check
+# Health check using new metrics endpoint
 HEALTHCHECK --interval=30s --timeout=3s --start-period=30s --retries=3 \
-    CMD node -e "http.get('http://localhost:3000/', (res) => process.exit(res.statusCode === 200 ? 0 : 1))" || exit 1
+    CMD node -e "http.get('http://localhost:3000/health', (res) => process.exit(res.statusCode === 200 ? 0 : 1))" || exit 1
 
 # Start the application
 CMD ["pnpm", "start"]

README.md

@@ -22,7 +22,8 @@ The backend API for the [Typelets Application](https://github.com/typelets/typel
 - ⚡ **Fast & Type-Safe** with TypeScript and Hono
 - 🐘 **PostgreSQL** with Drizzle ORM
 - 💻 **Code Execution** via secure Judge0 API proxy
-- 📊 **Performance Monitoring** with New Relic APM
+- 📊 **Production Ready** with structured logging and error handling
+- 🏥 **Health Checks** with detailed system status and readiness probes
 
 ## Tech Stack
 
@@ -31,7 +32,7 @@ The backend API for the [Typelets Application](https://github.com/typelets/typel
 - **Database**: PostgreSQL with [Drizzle ORM](https://orm.drizzle.team/)
 - **Authentication**: [Clerk](https://clerk.com/)
 - **Validation**: [Zod](https://zod.dev/)
-- **Monitoring**: [New Relic](https://newrelic.com/) for APM and error tracking
+- **Logging**: Structured console logging for development and production
 - **TypeScript**: Strict mode enabled for type safety
 
 ## Prerequisites
@@ -41,7 +42,6 @@ The backend API for the [Typelets Application](https://github.com/typelets/typel
 - PostgreSQL database (local installation or Docker)
 - Clerk account for authentication ([sign up here](https://dashboard.clerk.com))
 - Judge0 API key for code execution (optional - [get from RapidAPI](https://rapidapi.com/judge0-official/api/judge0-ce))
-- New Relic account for monitoring (optional - [sign up here](https://newrelic.com/signup))
 
 ## Local Development Setup
 
@@ -77,16 +77,13 @@ cp .env.example .env
    - Create a free account at [Clerk Dashboard](https://dashboard.clerk.com)
    - Create a new application
    - (Optional) Get Judge0 API key from [RapidAPI](https://rapidapi.com/judge0-official/api/judge0-ce)
-   - (Optional) Get New Relic license key from [New Relic Dashboard](https://one.newrelic.com/launcher/api-keys-ui.api-keys-launcher)
    - Update `.env` with your settings:
 
    ```env
    CLERK_SECRET_KEY=sk_test_your_actual_clerk_secret_key_from_dashboard
    CORS_ORIGINS=http://localhost:5173,http://localhost:3000
    # Optional: For code execution features
    JUDGE0_API_KEY=your_judge0_rapidapi_key_here
-   # Optional: For performance monitoring and error tracking
-   NEW_RELIC_LICENSE_KEY=your_new_relic_license_key_here
    ```
 
 5. **Set up database schema:**
@@ -169,7 +166,10 @@ If you prefer to install PostgreSQL locally instead of Docker:
 ### Public Endpoints
 
 - `GET /` - API information and health status
-- `GET /health` - Health check endpoint
+- `GET /health` - Enhanced health check with system status
+- `GET /metrics` - System metrics for monitoring dashboards
+- `GET /ready` - Readiness probe for container orchestration
+- `GET /live` - Liveness probe for container orchestration
 - `GET /websocket/status` - WebSocket server status and statistics
 
 ### Authentication
@@ -261,53 +261,6 @@ The application uses the following main tables:
 - **WebSocket Security**: JWT authentication, rate limiting, and connection limits
 - **Real-time Authorization**: Database-level ownership validation for all WebSocket operations
 
-## Performance Monitoring
-
-The API includes comprehensive monitoring via New Relic APM for production observability and performance optimization.
-
-### Monitoring Features
-
-- **Application Performance Monitoring (APM)**: Real-time performance metrics for HTTP requests, database queries, and external API calls
-- **Error Tracking**: Automatic error detection and alerting with detailed stack traces
-- **Custom Events**: Application startup, user authentication, and business logic events
-- **Transaction Tracing**: Detailed breakdown of slow requests and database operations
-- **Infrastructure Monitoring**: Server resources, memory usage, and system health
-
-### Environment-Specific Monitoring
-
-**Development Environment:**
-- App Name: `typelets-api-dev`
-- Debug-level logging with detailed instrumentation
-- Lower performance thresholds for early issue detection
-- Enhanced error collection and context
-
-**Production Environment:**
-- App Name: `typelets-api-prod`
-- Optimized logging for performance
-- High-security mode with sensitive data filtering
-- Production-tuned sampling rates
-
-### Monitored Operations
-
-- **HTTP Requests**: All API endpoints with response times and status codes
-- **Database Queries**: PostgreSQL operations with query performance tracking
-- **External APIs**: Judge0 API calls with latency and error monitoring
-- **WebSocket Operations**: Real-time connection management and message processing
-- **File Operations**: Upload/download performance and error tracking
-
-### New Relic Dashboard Access
-
-Once configured, monitor your application at:
-- Development: Search for `typelets-api-dev` in your New Relic dashboard
-- Production: Search for `typelets-api-prod` in your New Relic dashboard
-
-### Custom Monitoring
-
-The application sends custom events for business intelligence:
-- `ApplicationStartup`: Server initialization with configuration details
-- User authentication events with performance metrics
-- Slow operation alerts (configurable thresholds)
-- Resource usage patterns and scaling indicators
 
 ## Environment Variables
 
@@ -328,13 +281,9 @@ The application sends custom events for business intelligence:
 | `WS_MAX_CONNECTIONS_PER_USER`| Max WebSocket connections per user          | No       | 20          |
 | `WS_AUTH_TIMEOUT_MS`         | WebSocket authentication timeout in milliseconds | No   | 30000 (30 sec) |
 | `JUDGE0_API_KEY`             | Judge0 API key for code execution            | No*      | -           |
-| `NEW_RELIC_LICENSE_KEY`      | New Relic license key for APM monitoring     | No**     | -           |
-| `NEW_RELIC_APP_NAME`         | Custom New Relic application name            | No       | Auto-generated |
-| `NEW_RELIC_LOG`              | New Relic log output (stdout/stderr/filepath) | No      | stdout (dev) / file (prod) |
-| `NEW_RELIC_LOG_LEVEL`        | New Relic logging level (error/warn/info/debug/trace) | No | debug (dev) / info (prod) |
+| `LOG_LEVEL`                  | Logging level (error/warn/info/debug)        | No       | info (prod), debug (dev) |
 
 *Required only for code execution features
-**Required only for performance monitoring and error tracking
 
 ## Development
 
@@ -394,10 +343,8 @@ docker build -t typelets-api .
 # 3. Run API container for local testing
 docker run -p 3000:3000 --env-file .env typelets-api
 
-# Or with explicit New Relic configuration
+# Run with environment file
 docker run -p 3000:3000 \
-  -e NEW_RELIC_LICENSE_KEY=your_license_key_here \
-  -e NEW_RELIC_APP_NAME="typelets-api-dev" \
   -e NODE_ENV=development \
   --env-file .env \
   typelets-api
@@ -434,24 +381,6 @@ This application is designed for production deployment using AWS ECS (Elastic Co
 
 For production deployment, configure the same environment variables in your ECS task definition that you use locally in `.env`.
 
-### Production Monitoring Setup
-
-For production deployments, ensure New Relic monitoring is properly configured:
-
-```bash
-# Example production environment variables in ECS task definition
-NODE_ENV=production
-NEW_RELIC_LICENSE_KEY=your_production_license_key
-NEW_RELIC_APP_NAME=typelets-api-prod
-NEW_RELIC_LOG=stdout
-NEW_RELIC_LOG_LEVEL=info
-```
-
-This will automatically:
-- Enable production-optimized monitoring settings
-- Filter sensitive data from logs and traces
-- Set appropriate sampling rates for production scale
-- Create separate application monitoring (dev vs prod)
 
 ## Contributing