title: Github webhook URL config issue? How to fix it?
body: <p>I am using  GitHub project repository for build trigger from Jenkins.</p>
  
  <p>The intention is when even code push done in GitHub repository project my Jenkins build should trigger automatically.</p>
  
  <p>Steps done:</p>
  
  <ul>
  <li>Create Jenkins job for build trigger</li>
  <li>Config the setup on that particular job 
  
  <ul>
  <li>Source Code Management management selected Git and updated Repository URL which I got from GitHub project code and have updated <code>https</code> Git URL</li>
  <li>updated the GitHub credentials</li>
  <li>Build trigger option</li>
  </ul></li>
  <li>I have selected <em>Build when a change is pushed to GitHub</em></li>
  <li>then GitHub have update the webhook from setting </li>
  <li>I have added the webhook URL like <a href="http://ABCDEFGH123:8080/github-webhook/" rel="nofollow noreferrer">http://ABCDEFGH123:8080/github-webhook/</a></li>
  <li>and selected <code>Content type</code> is <code>application/json</code></li>
  </ul>
  
  <p>While updating the webhook URL it shows the error message:</p>
  
  <blockquote>
    <p>We couldn’t deliver this payload: Couldn't resolve host name</p>
  </blockquote>
  
  <p>See the screenshot for reference. Please have a look. Please share the solution. Why am I unable to update the webhook URL? How to fix it?</p>
  
  <p><img src="https://i.stack.imgur.com/YcR2g.jpg" alt="https://i.stack.imgur.com/YcR2g.jpg">
  <img src="https://i.stack.imgur.com/YcR2g.jpg" alt="https://i.stack.imgur.com/fbpSm.jpg"></p>