Runs the app in development mode. Open http://localhost:3000 to view it in the browser.
Runs the test watcher in an interactive mode. By default, runs tests related to files changed since the last commit.
Builds the app for production to the build folder. It correctly bundles React in production mode and optimizes the build for the best performance.
The build is minified and the filenames include the hashes. By default, it also includes a service worker so that your app loads from local cache on future visits.