I finally have this working :-O I started with getting official certs for
everything. Then had to add our trust chain to the Docker image trust store.
Here is some relevant bits from the Discourse app.yml:
## GitLab OmniAuth settings
>
> GITLAB_APP_ID: foo
>
> GITLAB_SECRET: bar
I have a development or two. I managed to get Discourse login through a
Gitlab popup to work. But it's using the password from Discourse. In
addition to the instructions for discourse-omniauth-gitlab, what other
settings must be changed in Discourse. Which of the sso settings must be
changed i
