Node.js Runtime Basics

Install-check Node.js, run your first script, and understand what changes outside the browser.

Node.js npm and package.json

Create a real package.json, add scripts, run npm commands, and understand dependencies.

Split a Node.js project into real files using `require` and `module.exports`.

Read JSON from disk with `node:fs/promises`, parse it, and handle file errors.

Read configuration from `process.env`, use safe defaults, and avoid leaking secrets.

Create a small HTTP server with the built-in `node:http` module and test it with curl.