You need to setup a MongoDB Database otherwise this App wont work and you will get a crash error in your Terminal window. Either create a local database or create/use an account on MondoDB Atlas or mlab
Then add the database mongoLab URI to server/server.js. Make sure that you create a user and a password for the login.
Example code in server.js file below:
// Replace with your mongoLab URI
const MONGO_URI = 'mongodb://<dbuser>:<dbpassword>@ds11111.mlab.com:11111/databasename';
Run the command below in the root and client folder to install node
npm install
Run the command below in the root folder, to start the app
npm run dev
The App is running at http://localhost:4000/#/