build react app

// Go into the folder where you wish to create your app
yarn create react-app appnamenpx create-react-app my-app
cd my-app
npm startnpx create-react-app app-name
cd app-name
npm startnpx create-react-app project-namenpx create-react-app my-app
cd my-app
yarn startBuild a react project
Code has to be bundled using a bundler like webpack and
 transformed using a compiler like Babel.
do production optimizations such as code splitting(critical CSS)
statically pre-render some pages for performance and SEO. 
use server-side rendering or client-side rendering.
write some server-side code to connect your React app to your data store.
OR use create-react-app