In the project directory, you can run:
Runs the widget in the development mode.
Open http://localhost:3000 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 the widget for production to the dist/bundle/react-widget-app.js folder.
The build is minified and packaged to a single file and is ready to be uploaded to the store.