Rocket.Chat/packages/gitlab/gitlab_configure.html

<template name="configureLoginServiceDialogForGitlab">
  <p>
    First, you'll need to get a Gitlab Client ID. Follow these steps:
  </p>
  <ol>
    <li>
      Visit <a href="https://gitlab.com/oauth/applications/new" target="blank">https://gitlab.com/oauth/applications/new</a>
    </li>
    <li>
      Set Authorization callback URL to: <span class="url">{{siteUrl}}_oauth/gitlab</span>
    </li>
  </ol>
</template>