node

For Node developers building REST APIs and web apps on Express: covers app and router setup, route definition (params/query/Router chains), request and response objects, the middleware ecosystem (json, static, cors, helmet, morgan, compression), EJS rendering, JWT auth, and async error handling.

PM2 process-management commands across start/stop/restart and zero-downtime reload, log management and rotation, cluster mode, monitoring, boot-start and deployment — with key flags explained. For running and keeping Node.js services alive in production.

npm commands across project init/scaffolding, install/update/remove, version management and lockfiles, script running and npx, dependency inspection and auditing, publishing, and config/cache. For running a Node.js project's full lifecycle without leaving the terminal.