Serves as a reverse proxy and load balancer to distribute incoming traffic. Phase 1: Configuring Node.js and PM2

Provides ultra-fast caching and session management to reduce database load.

This decoupling ensures that even if your main API is under heavy load, the background tasks won't slow down the user experience. Phase 3: Scaling with Redis and Nginx

Utilizes all CPU cores by spawning multiple instances of your app.

This guide provides a comprehensive walkthrough and a link to the complete source code for this architecture. The Power of the Stack