title: Service worker is not registering
body: <p>I'm trying to register the Service worker and getting an error:</p>
  
  <pre><code>DOMException: Operation failed by network issue
  </code></pre>
  
  <p>The page is hosted using github pages: <a href="https://boopathi.in/sw-demo-iss" rel="nofollow">https://boopathi.in/sw-demo-iss</a>. and the source code is here <a href="https://github.com/boopathi/sw-demo-iss" rel="nofollow">https://github.com/boopathi/sw-demo-iss</a> </p>
  
  <p>I'm trying to understand what that means and how to resolve errors. </p>