well some people like docker and some don't. If you are in the self-hosting realm, personally I think it is fair that the people doing it knows about DevOp or systemadmin, or else pay someone to host it for you.
On their webpage it says that you can get started in 30 seconds with their hosted instance. Would be nice if it was as simple to get started with a locally hosted instance.
I don't want a new project, I want to try self-hosting the software. If I am using it and liking it then certainly I would put time and effort into it. If it takes some time fiddling around with docker even to use, well, I have other projects to fiddle.
That goes for all self-hosted, but especially so for a project management tool. I'd be trialing it because I have projects I already need help managing. Adding one more is friction that would likely turn me away.
Where did you get this from? You do not need to fiddle around with anything to have it working. The only thing that _probably_ requires "fiddling" is the nginx port - and you need to change it only if the default port is already in use. Is it really that difficult nowadays???
I think it’s reasonable to provide as close to a one-line / one-action initial install, even for people who are experienced admins. (Those experienced folks can edit/tweak as they like, but having a basic “push this and something sensible happens” goes a long, long way to getting people to succeed in trying the product.)