Docker compose file for a Gitlab instance with Fablabs.io login

docker-compose.yml

# Fill in your fablabs.io app_id and secret from the fablabs.io developer console
# set the callback_url as http://yourhost/users/auth/fablabs/callback
# if you replace localhost with a public hostname, comment out the let's encrypt line 
web:
  image: 'gitlab/gitlab-ce:latest'
  restart: always
  hostname: 'localhost'
  environment:
    GITLAB_OMNIBUS_CONFIG: |
      external_url 'http://localhost'
      # comment the line below to enable let's encrypt certificates, will fail with localhost
      letsencrypt['enable'] = false
      # Add any other gitlab.rb configuration here, each on its own line
      gitlab_rails['omniauth_enabled'] = true
      gitlab_rails['omniauth_allow_single_sign_on'] = ['fablabs']
      gitlab_rails['omniauth_block_auto_created_users'] = false
      gitlab_rails['omniauth_providers'] = [
      {
        "name" => "fablabs",
        "app_id" => "your_fablabs_io_app_id",
        "app_secret" => "your_fablabs_io_app_secret",
        "args" => {
          client_options: {
            'site' => 'https://api.fablabs.io',
            'user_info_url' => '/2/users/me.json'
          },
          user_response_structure: {
            root_path: ['data', 'attributes'],
            attributes: { nickname: 'username' }
          },
          redirect_url: 'https://localhost/users/auth/fablabs/callback',
          name: 'fablabs',
          strategy_class: "OmniAuth::Strategies::OAuth2Generic"
        }
      }
      ]

  ports:
    - '80:80'
    - '443:443'
    - '22:22'
  volumes:
    - '/srv/gitlab/config:/etc/gitlab'
    - '/srv/gitlab/logs:/var/log/gitlab'
    - '/srv/gitlab/data:/var/opt/gitlab'