title: SocketConnectException when connecting to GRPC Server
body: <p>I built a GRPC Server in NodeJS, Generated the Client Libraries for Dart and then Deployed the Server on Heroku.</p>
  <p>When I tried connecting to the GRPC Server by Proividing the url as <code>https://api.appname.come</code> and provided the PORT Number From the Dart Client I keep Getting Failed to resolve host, SocketException.</p>
  <p>This is the full Error message that I keep getting:</p>
  <pre><code>E/flutter (10136): [ERROR:flutter/lib/ui/ui_dart_state.cc(186)] Unhandled Exception: gRPC Error (code: 14, codeName: UNAVAILABLE, message: Error connecting: SocketException: Failed host lookup: 'https://appname.herokuapp.com' (OS Error: No address associated with hostname, errno = 7), details: null, rawResponse: null)
  E/flutter (10136): 
  </code></pre>
  <p>Please, how do I resolve this?</p>