Is there any information or documentation on how Moodle's messages.moodle.net now works with Google's Firebase Cloud Messaging (FCM)? Google Cloud Messaging (GCM) I believe is being deprecated this month, but that remains the service that the AirNotifier fork supports.
We are aware of Moodle's branded app service, but we have the skills in-house to achieve something similar. I have a custom version of the app built, but am struggling to find any information on how to integrate Firebase with a custom instance of AirNotifier(?) and deliver push notifications from Moodle to devices that way.
Thank you for any insight anyone might be able to give.