Integrate everything: architecture, real-time, deployment, and CI/CD.
Structuring full stack apps: folders, env config, and shared types.
CORS, proxies, cookies, auth flows, and API client patterns.
WebSockets, rooms, events, and building a real-time chat.
Multer, validation, and cloud storage with Cloudinary.
Deploy MERN apps: MongoDB Atlas, Render/Railway, Vercel, and GitHub Actions.
Build and deploy a complete MERN application with auth, CRUD, and real-time features.