Documentation for annotations fields

[bartoszWesolowski]

Issue in /src/pages/guides/appbuilder-configuration.md

Hello,

As far as I can see there are in APP builder configuration file app.config.yaml there are some properties that do not have documentation explaining how to use them, for example:

• require-adobe-auth
• annotations/provide-api-key

Seems those are important ones but I can not find anything in the spec about them so it would be worth adding them to the docs.

Cheers,
Bartek