Discourse is a lovely new forum/mailing list software which is proving popular elsewhere.
At Akademy 2019 it was said that it would be good to set it up for KDE to move over forum.kde.org and, when projects are ready, mailman lists.
We had some queries which I sent to the devs and which are answered here
I set up a testing instance here which works fine
but it still needs some of the plugins and settings discussed in the post above to be decided.
List of issues we had before Akademy here
I suspect identity will be the blocker for now.
I'm happy to do the setup if given access to machines to do it on.