Firstly, discord is entirely the wrong medium for documentation.
Secondly, documentation should be at least as accessible as the code. That is to say, if I can view the code without creating an account for some service, then I should also be able to read the documentation too.
Documentation is bad enough. But it's worse when that's the only channel to get support. I once read a project maintainer boast that they never read the bug reports and issues on github and if anyone had a bug to just chat him up discord. I mean, dude, no wonder nobody uses your software or takes it seriously. Much less want to collaborate on the development.