In the project directory, you can run:
Runs the app 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.
Launches the test runner in the interactive watch mode.
See the section about running tests for more information.
Creates a production build of the site which you can then run to test what the site looks like live.
This command is also used in CI to produce an output build which is deployed and used in Github pages.