Verify React tutorial

[alansemenov]

Go through https://developer.enonic-qa.com/docs/using-react-with-enonic-xp/stable, follow the hands-on exercises and verify that everything works according to the docs. Fix mistakes/typos (if any), add anything you feel is missing.

[pmi]

• Chapter 1 doesn't say anything about sandbox. Clean sandbox doesn't even have Content Studio (use Essentials template that incl guillotine ?)
• Chapter 3: not clear if I need to create webapp or not ?
• Chapter 4: Missing sources for:

  export { getStaticEsmUrl } from '/services/static/getStaticEsmUrl';
  export { getStaticNodeModuleUrl } from '/services/static/getStaticNodeModuleUrl';

• Chapter 5: Missing sources for

  import './styles/body.sass';
  import './styles/reactRoot.sass';

• Chapter 6: Missing sources for

  import PERSON_LIST_QUERY from '../queries/personList.gql';
  import '../styles/personList.sass';
  import {BREAK_POINTS} from './constants';

• Chapter 7: Missing sources for

  import PERSON_QUERY from '../queries/person.gql';

• All chapters:
  • no deployments or any incremental checks if it works
  • where and how to see the results ?