How to build a secure API gateway in Node.js` is an article that guides the reader through building a secure API gateway using Node.js and various open-source packages. The article covers key topics such as creating a basic web server, setting up authentication and rate limiting, logging, cross-origin resource sharing (CORS), proxying, and configuration. The final app combines all these features into a single codebase, demonstrating how to build a secure API gateway from scratch using Node.js.