How to
1. Create a repository on GitHub (<your-username>/<your-repo>)
2. Create a db.json file
3. Visit https://my-json-server.typicode.com/<your-username>/<your-repo> to access your server
No registration. Nothing to install.
Example
You can check the following server as an example: https://my-json-server.typicode.com/HanHlaing/JSON_Server/blob/master/posts