I am also struggling with this, for example;

1) For the Image Store URI, I intend to use a Portus registry. Do I need
to put the FQDN and port number or just FQDN? For example,
portus.domain.com:5000 ?

2) For the profiles, does the git path require no authentication? It is
not clear how I should authenticate to my git repository?

3) Where can I find the logs? I only see in the Events > Pending of the
Container Build host that the action has not yet been picked up (it
never gets picked up so I assume I did something wrong)