add react bootstrap code example

Example 1: add bootstrap to react

1.run commnad in cmd
npm install bootstrap --save

2.after install add this to index.js
import 'bootstrap/dist/css/bootstrap.min.css';

Example 2: react import bootstrap css

{/* The following line can be included in your src/index.js or App.js file*/}

import 'bootstrap/dist/css/bootstrap.min.css';

Example 3: how to install bootstrap in react

npm install bootstrap --save // Inside of your command line

import 'bootstrap/dist/css/bootstrap.min.css'; // Inside of your index.js