Add common customizations to the documentation site
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3431247. -->
Reported by: [fjgarlin](https://www.drupal.org/user/2495842)
Related to !159
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>After watching part of this presentation (the one focused on GitLab CI): <a href="https://youtu.be/c6hg5sEE8Sg?feature=shared&t=1347">https://youtu.be/c6hg5sEE8Sg?feature=shared&t=1347</a><br>
It lasts around 12 minutes (minute 22 to minute 34) and covers some great examples, so maybe we can add those examples to our <a href="https://project.pages.drupalcode.org/gitlab_templates/info/common/">https://project.pages.drupalcode.org/gitlab_templates/info/common/</a> or <a href="https://project.pages.drupalcode.org/gitlab_templates/info/customizations/">https://project.pages.drupalcode.org/gitlab_templates/info/customizations/</a> sections. </p>
<p>Slides: <a href="https://berdir.github.io/drupalorg-workflows/">https://berdir.github.io/drupalorg-workflows/</a> (move to slide 34 and then navigate down)</p>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<p>Update documentation:<br>
* Tweaks to existing jobs<br>
* Custom images<br>
* Setting some jobs as manual<br>
* ...</p>
<h3 id="summary-remaining-tasks">Remaining tasks</h3>
<p>MR against the "docs" folder</p>
> Related issue: [Issue #3426136](https://www.drupal.org/node/3426136)
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