title: Blue Ocean - 'Repository URL - Please enter a valid URL' error
body: <p>I'm trying to make a Pipeline in Blue Ocean. I want to use a <strong>local repo</strong> but whatever I enter in the text field I get the error <strong>'Repository URL - Please enter a valid URL'</strong> </p>
  
  <p>I've tried</p>
  
  <pre><code>/home/ustrd/IdeaProjects/tutorial_ranking/.git/
  /home/ustrd/IdeaProjects/tutorial_ranking/.git
  file:///home/ustrd/IdeaProjects/tutorial_ranking/.git/
  file:///home/ustrd/IdeaProjects/tutorial_ranking/.git
  </code></pre>
  
  <p>following the information on a Jenkins official page:</p>
  
  <p><em>If your URL is a local directory path (e.g. beginning with a forward slash / such as /home/cloned-git-repos/my-git-repo.git), you can proceed to click the Create Pipeline button.</em> <a href="https://jenkins.io/doc/book/blueocean/creating-pipelines/" rel="nofollow noreferrer">https://jenkins.io/doc/book/blueocean/creating-pipelines/</a></p>
  
  <p>Does it have something to do with the fact that I run Jenkins from a Docker container? Any ideas?</p>