In the project directory, you can run:
Runs the app on Rinkeby in 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.
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.