Building an API that works on your local machine is just the first step. But what separates a hobby project from a production-ready product? In today's post, I'll show how I transformed my feedback system into a robust, secure, and fully documented application. 🔐 1. The Digital "Key": Implementing JWT Up until now, anyone who discovered my API URL could read every feedback ever submitted. In a real-world scenario, this is a critical privacy failure. To solve this, I implemented JWT (JSON Web Token) using @fastify/jwt . The flow now works as follows: The admin logs in with secure credentials. The API generates a signed token. This token must be sent in the header of every request to protected routes. The game-changer here was using a Fastify decorator to create an authenticate hook. Now, protecting a route is as simple as adding a single line of code. 📖 2. Pro Swagger: Documentation that actually works Documentation isn't enough; it needs to be useful.…