First create-react-app example for CS-686

This project is just a counter button component.

You can run the project one of two ways, using npm, or using yarn.

Using npm

git clone https://github.com/LevinWeinstein/HelloWorldReactExample
cd HelloWorldReactExample
npm install
npm run start

Using Yarn

git clone https://github.com/LevinWeinstein/HelloWorldReactExample
cd HelloWorldReactExample
yarn
yarn start