Well dang, I have Nextcloud installed as a snap (which has been perfectly stable for me when running on Ubuntu Server), but I was thinking of switching over to a docker installation; this thread doesn’t exactly fill me with enthusiasm for that idea…
Unfortunately, comments, and votes don’t appear to be federating from Peertube. I’ve opened some issues (LemmyNet/Lemmy#4314, LemmyNet/Lemmy#3837, LemmyNet/lemmy-ui#2161) for this in the past, and, from what I’ve heard, it may be an issue with Peertube’s federation implementation.