Setup a quick basic react app

To create a basic Reactjs app.

Before getting started. Make sure you install NVM, Nodejs 

npx create-react-app my-app
cd my-app
npm start

(npx comes with npm 5.2+ and higher)

Then open http://localhost:3000/ to see your app.
When you’re ready to deploy to production, create a minified bundle with npm run build.