At the moment I’m testing Hedgedoc, I took a quickie look at haste-server but from what I read it got enshittified a while ago while I was busy not looking at it lol. Anyway I’ve looked at other alternatives from the link and from selfhosting communities and both OpenGist and ExBin are looking at the things for me to try next for comparison. Thanks for the guidance!
How about a guillotine? Those don’t seem to require a religious belief, only a modicum of trust in the well-studied force of gravity.