# GitLab (self-hosted)

**Note:** *This guide was written before the renaming. Just replace `HackMD` with `HedgeDoc` in your mind 😃 thanks!*

1. Sign in to your GitLab
2. Navigate to the application management page at `https://your.gitlab.domain/admin/applications` (admin permissions required)
3. Click **New application** to create a new application and fill out the registration form:

    ![New GitLab application](../../images/auth/gitlab-new-application.png)

4. Click **Submit**
5. In the list of applications select **HackMD**. Leave that site open to copy the application ID and secret in the next
   step.

   ![Application: HackMD](../../images/auth/gitlab-application-details.png)

6. In the `docker-compose.yml` add the following environment variables to `app:` `environment:`

    ```yaml
    - CMD_DOMAIN=your.hedgedoc.domain
    - CMD_URL_ADDPORT=true
    - CMD_PROTOCOL_USESSL=true
    - CMD_GITLAB_BASEURL=https://your.gitlab.domain
    - CMD_GITLAB_CLIENTID=23462a34example99XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
    - CMD_GITLAB_CLIENTSECRET=5532e9dexamplXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
    ```

7. Run `docker-compose up -d` to apply your settings.
8. Sign in to your HedgeDoc using your GitLab ID:

   ![Sign in via GitLab](../../images/auth/gitlab-sign-in.png)