Creation of a Single Page Application using React.
Runs the app in the development mode.
Open http://localhost:3000 to view it in your browser.
The page will reload when you make changes.
You may also see any lint errors in the console.
Launches the test runner in the interactive watch mode.\
Builds the app for production to the build folder.
It correctly bundles React in production mode and optimizes the build for the best performance.
Analyses and checks the source code.
Paul Maki