Make sure you are in - MERN_A_to_Z_Client/mern_a_to_z_client/ directory & type the following command
$ npm install
$ npm start
This tutorial is all about the MERN stack. We are going to explore this popular stack and how to use it by developing a simple CRUD (create, read, update, and delete) application from scratch. In this part, we will work with React to build out the front-end portion of our app.
JavaScript
$ npm install
$ npm start