Node.js Server Best Practices for Production

Node.js Server Best Practices for Production

Running a Node.js server in production requires best practices beyond development. Here are the key ones.

Use Environment Variables for Configuration

Never hardcode ports, database URLs, or secrets. Use process.env with dotenv so each environment has its own configuration.

Use a Process Manager

Use PM2 or systemd to manage your Node.js process. A process manager handles restarts, clustering, and monitoring, which are essential for production.

Add Security Middleware

Use helmet for security headers, cors for cross-origin control, and express-rate-limit for rate limiting. These are essential for production security.

Handle Errors Globally

Add a global error handler so one request's error does not crash the server. Express has app.use(errorHandler) for this.

Keep the Event Loop Non-Blocking

Always use async APIs in request handlers. Never run heavy synchronous code on the main thread. Profile and monitor event loop lag.

Use Logging

Use a logging library like winston or pino for structured logs. console.log is fine for development but not for production monitoring and debugging.

Enable Compression

Use compression middleware to gzip responses. This reduces bandwidth and improves response times, especially for large JSON payloads.

The Takeaway

Run a production Node.js server with environment variables, a process manager like PM2, security middleware (helmet, cors, rate limiting), a global error handler, non-blocking async APIs, structured logging, and compression middleware.