The answer
Use Swagger (OpenAPI) for interactive docs, Postman for shared collections, or a simple markdown file with examples. Documentation is what makes an API usable. Without it, only the author knows how to call it.
REST API Roadmap for Node.js Developers
How do I document a REST API?
More FAQs in REST API Roadmap for Node.js Developers
Learn HTTP, learn Express, learn REST principles, design an API before coding, add MongoDB with Mongoose, add input validation, add JWT auth, add error handling, add security middlewares, add pagination and filtering, add logging, test, document, and deploy.
HTTP. Methods (GET, POST, PUT, PATCH, DELETE), status codes, headers, the request-response cycle. Without HTTP, REST design will not make sense.
After databases and CRUD. Auth depends on user schemas, password hashing, and tokens. It is a natural next step after you can store and retrieve users.
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