Q50: What step-by-step checklist should you follow to production-harden an Express app?
Follow this engineering checklist to ensure your Express application is secure, resilient, and performant before deploying to production:
Express Production Hardening Checklist
1. Set Environment:
NODE_ENV=productionDisables verbose error page outputs and enables template caching.
2. Security Headers:
app.use(helmet())Secures HTTP response headers and hides server details.
3. Rate Limiting:
express-rate-limit + RedisPrevents DoS and brute-force attacks on API endpoints.
4. Payload Compression:
app.use(compression())Compresses text responses to save bandwidth and lower latency.
5. Process Management:
PM2 / Docker / Cluster ModuleKeeps workers running and handles automatic process restarts on failure.
Key Takeaways
- Always set
NODE_ENV=productionto disable debug stack traces and enable internal caching. - Combine reverse proxies (Nginx), security headers (Helmet), and rate limiters for comprehensive security.