Thanks for the tip Squid regarding the Community Apps setting.
I performed the search and tried to set up a docker container but got this error:
root@localhost:# /usr/local/emhttp/plugins/dynamix.docker.manager/scripts/docker run -d --name="discourse" --net="bridge" -e TZ="Australia/Sydney" -p 2222:22/tcp -v samsaffron/discourse
Error response from daemon: No command specified
Not really sure what to do - I'm not familiar with Dockerfile syntax etc.
Maybe I'd be better off with a minimal Ubuntu docker and then ssh into it as per instructions here: https://github.com/discourse/discourse/blob/master/docs/INSTALL-cloud.md
I'd like to run the discourse Docker image, but not sure whether 1) I can run it as is from github, or 2) if unRAID-specific mods are required.
Can anyone advise and maybe provide some links to further reading?