This is a simple application emulating a basic REST API. It allows CRUD operations (Create, Read, Update, Delete) on different collections, where each collection is represented as a JSON file in the filesystem. If the collection does not exist, it is automatically created. This becomes particularly handy during front-end development, especially when the back-end is still in the process of being develop. By default, the app will listen on localhost:5800. If you need to change the HOST and PORT, you can pass the values as arguments. Enter http://localhost:5800 to see the available collections.