MERN + TypeScript Code Cheat Sheet — Part 2 (BullMQ, Puppeteer, SQL, Testing, Re

<p>Your API endpoint sends an email, generates a PDF, and resizes an image. Response time: 8 seconds. Users rage-quit. Move heavy work to a background queue.</p> <h2> Basic Queue

<p>You add a recurring job to a Node.js service. It works on your laptop. Then you deploy three replicas, and all three run the job.</p> <p>Each process has its own timer. Without