Use real backend (2.x.x) instead of fake backend for demo purposes

What needs to be changed?

The demo app published for reviews and in staging environments needs to show data from real backend (now that is available).

How is the current state not sufficient?

Fake data don't show actual situation as with real data.

Which changes are necessary?

Other environment should be chosen for environment for publishing the app for review/staging.

Do the proposed changes impact current use cases?

No.

Note: I would leave the fake backend feature though, in case someone needs it to locally try something with other data (data that is not available on the backend).