title: The gitlab Pipeline fails (because of docker rate limit)
body: <p>I have a gitlab-ci.yml in my project.</p>
  <p>It was passed, after every merge.</p>
  <p>But today it faces this error:</p>
  <pre><code>Preparing the &quot;docker&quot; executor
  00:31
  Using Docker executor with image maven:3.6.3-jdk-11 ...
  Pulling docker image maven:3.6.3-jdk-11 ...
  ERROR: Preparation failed: Error response from daemon: toomanyrequests: You have reached your pull rate limit. You may increase the limit by authenticating and upgrading: https://www.docker.com/increase-rate-limit (docker.go:131:3s)
  Will be retried in 3s ...
  </code></pre>
  <p>What can I do for solving this?</p>
  <p>thanks in advance</p>