CI: Switch drupalci image registry from dockerhub to gitlab.com (mitigate rate limit errors)
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3516958. -->
Reported by: [maxwhitehead](https://www.drupal.org/user/3763728)
Related to !343
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>Docker hub has significantly reduced rate limits for pulls as of 4/1, and also made unexpected changes to DA's dockerhub license.</p>
<p>Drupal CI is erroring due to limit - additional context + discussion in Drupal slack thread: <a href="https://drupal.slack.com/archives/CGKLP028K/p1743611728165519?thread_ts=1743001107.585039&cid=CGKLP028K">https://drupal.slack.com/archives/CGKLP028K/p1743611728165519?thread_ts=1743001107.585039&cid=CGKLP028K</a></p>
<h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<p>Community is reporting CI failures</p>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<p>We are moving CI images off of docker hub to gitlab.com registy here: <a href="https://gitlab.com/drupal-infrastructure/drupalci/drupalci-environments/container_registry/">https://gitlab.com/drupal-infrastructure/drupalci/drupalci-environments/container_registry/</a></p>
<h3 id="summary-remaining-tasks">Remaining tasks</h3>
<p>gitlab templates CI needs to be updated to point at new registry. I will open an MR.</p>
> Related issue: [Issue #3516954](https://www.drupal.org/node/3516954)
> Related issue: [Issue #3516973](https://www.drupal.org/node/3516973)
issue