how to make a react server code example

Example 1: build react app

Build 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

Example 2: create react app

npx create-react-app  my-app // my-app or Enter Your Project name
cd my-app // To enter your creating app by command cd 
npm start // To start your app in default browser