Introduction A REST API is a way for a frontend, a mobile app, or another service to ask your server for data, and to send data back. Node.js with Express is a good first choice for learning APIs because the setup is small and the concepts transfer to other backend frameworks. In this post, you will build a tiny users API with two routes: one to list users, and one to add a user. Step 1: Set up the project Create a folder, then run: npm init -y npm install expr...