Clean up using Controllers

In this tutorial, the instructor demonstrates how to refactor a Node.js backend by creating controllers to handle functionality, thus simplifying the routes. The process involves setting up a new folder for controllers, creating functions for getting products, and exporting these functions. The instructor also shows how to slim down the routes by importing the controller methods and testing the setup using Postman. The tutorial concludes with a cleaner and more organized code structure, setting the stage for future work on user authentication and registration.

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