I had a similar problem, but getting the GitLab oauth to work. I did the following:
volumes:
- volume:
host: /var/discourse/shared/standalone
guest: /shared
- volume:
host: /var/discourse/shared/standalone/log/var-log
guest: /var/log
## Plugins go here
## see https://meta.discourse.org/t/19157 for details
hooks:
after_code:
- exec:
cd: $home/plugins
cmd:
- git clone https://github.com/discourse/docker_manager.git
- git clone https://gitlab.com/gitlab-org/discourse-omniauth-gitlab.git
run:
- exec: echo "Beginning of custom commands"
## If you want to set the 'From' email address for your first registration, uncomment and change:
## After getting the first signup email, re-comment the line. It only needs to run once.
#- exec: rails r "SiteSetting.notification_email='info@unconfigured.discourse.org'"
- exec: apt install unzip
- exec: unzip /shared/ssl/NTAM_Collection_Ubuntu_2016.2.zip -d /usr/local/share/ca-certificates/
- exec: chmod 444 /usr/local/share/ca-certificates/*
- exec: c_rehash /usr/local/share/ca-certificates
- exec: update-ca-certificates
- exec: echo "End of custom commands"