$ yarn install
# Commands
$ yarn start # Start webpack-dev-server, open http://localhost:3000/app
$ yarn dev # same as $ yarn start
$ yarn build # Build to /public/assets/build/
$ yarn lint # Check type and syntax, auto fix
$ yarn test # Test
$ yarn test:console # Test with console.log
$ yarn test:clean # Clear cache
$ yarn storybook # Start storybook
$ yarn storybook:build # Build to /frontend/storybook-static/