You can see how this app works on this link: https://www.youtube.com/watch?v=V3W-CaxW7qc
First install npm, node and create-react-app
setup mongodb from config/keys.js
Pull the request. Get into the sen folder in terminal. Write "npm install" in the terminal to install dependencies. Write "npm run server" in the terminal to start back-end server.
Now open another terminal. Get into the sen folder in terminal. Type "cd client" so now you are in client folder. Write "npm install" in the terminal to install dependencies. Write "npm start" in the terminal to start server.