Runs the app in the development mode. Open http://localhost:8080 to view it in the browser.
The page will reload if you make edits. You will also see any lint errors in the console.
Builds a static copy of your site to the build/ folder.
Your app is ready to be deployed!
Launches the application test runner.
Run with the --watch flag (npm test -- --watch) to run in interactive watch mode.