title: How to run multiple gitlab-ci-runners?
body: <p>Well, very basic question but I just didn't find (good) documentation; here we go:</p>
  
  <ul>
  <li>Can I setup/run several runners on the same server?</li>
  <li>What means runner? Is this the (omnibus) installation or the processes I start with e.g. <code>/opt/gitlab-runner/bin/runner</code>?</li>
  <li>Regarding <code>/opt/gitlab-runner/bin/runner</code>: does it make sense to start several such processes? (They don't show up individually under the 'Runners' tab in the gitlab-ci webview)</li>
  </ul>
  
  <p>Thanks.</p>