use icons in react code example

Example 1: font awesome react

npm install --save @fortawesome/fontawesome-free

Example 2: react font awesome

$ npm i --save @fortawesome/fontawesome-svg-core  @fortawesome/free-solid-svg-icons @fortawesome/react-fontawesome

Example 3: react icons

npm install react-icons --save

Example 4: react icons

npm i react-icons