E-Commerce web-client - EAD

1. Run "npm install" backend, frontend, and leading(main) directory separately.

2. Create .env file inside the frontend directory and initialize the following values

   < For WIN users >
   REACT_APP_WEB_API = http://localhost:2030/api
   
   < For MAC users >
   REACT_APP_WEB_API = http://localhost:5004/api
   

3. Create .env file inside the backened directory and initialize the following values

   NODE_ENV = development
   PORT = 5000
   MONGO_URI = mongo db url here without "" or ''