Add working auth(n|r) to example app.

[DutchBen]

After feedback from a few users it seems useful to have a working example of a authentication and authorization in the example orchestrator. That way users can fall back to a working example when stuck implementing it.

For authorization a minimal example implementation could show where decision making is triggered and what is passed into the function handling the decision. So a function that always returns true and an example where it can be bootstrapped in both frontend and backend.

Follow up ticket to: #1361