Creating react app using yarn

Step 1: Install yarn

https://classic.yarnpkg.com/en/docs/install/#debian-stable

Step 2: Create a command line tool create-react-app

yarn global add create-react-app@1.5.2

Step 3: Make your app

create-react-app <AppName>

Step 4: Start your app

cd <AppName>
yarn start

Check your app at http://localhost:3000/

Step 5: (Optional) install these based on your need

yarn add bootstrap@4.0.0
yarn add reactstrap@5.0.0
yarn add react-popper@0.9.2

use the following for npm

npm install <package>@<version> --save