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.\
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.
Note: this is a one-way operation. Once you eject, you can’t go back!
If you aren’t satisfied with the build tool and configuration choices, you can eject at any time.
Runs the code quality check. You will see any lint errors in the console.