Modified Project for MVC

[NOBLE2008]

Hi, I came across your code. Well written code by the way, but i want to make a contribution. I would like to improve your code by modifying the project to suit MVC Architecture. I have tested the code and the code still works perfectly after my modifications. MVC Architecture is a well known architecture that is used in MERN Projects. And i have introduced a controller section in your backend that will be in charge of performing actions and functionality of the website. The controller section will communicate with the model section for the model to handle business logic. So why why don't you accept my pull request and add the improvement to your code and i'll start working on creating controllers for the Order, Product and Upload route.