title: No issuer certificate for certificate in certification path found
body: <p>I am trying to build an app for <a href="http://developers.tokenbrowser.com/docs/configuration" rel="nofollow noreferrer" title="Token Browser">Token Browser</a>, I have followed all the instructions. Created a Docker Environment and entered all the configuration. When I'm running the <code>docker-compose up</code> I receive the following error. Any help would be greatly appreciated.</p>
  
  <pre><code>org.whispersystems.signalservice.api.push.exceptions.PushNetworkException: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: java.security.cert.CertPathBuilderException: No issuer certificate for certificate in certification path found.
  </code></pre>
  
  <p>Notes: Received this on both Linux 16.04 (Virtual Box) and Windows 10 Home. </p>