As Priha is still in alpha stage, the only place for support is to join the priha-users mailing list.
If you wish to help out in development, please join the priha-dev mailing list.
All commits to the Priha GitHub repository are sent to the priha-commits mailing list. This is the easiest way to follow what is going on - and definitely recommended for all developers.
Priha issues are tracked on Priha GitHub.