I'm so excited about existing self-hosted applications (https://selfh.st/apps/) and possibilities to integrate them, so I dumped some of my random thoughts on pubnix-like community infrastructure in this post:
https://lists.sr.ht/~abcdw/rde-discuss/%3C87zfs320es.fsf@trop.in%3E
@abcdw quick bug report the link in the confirmation email uses http and not https