Connection constants to point to our server

constants.dart

final options = ChannelOptions(
  credentials: ChannelCredentials.insecure(), // we're not using TLS
  connectionTimeout: Duration(milliseconds: 500),
  idleTimeout: Duration(
    milliseconds: 500,
  ),
);

final clientChannel = ClientChannel(
  '0.0.0.0',  // host the server is running on 
  port: 12345,  // port the server is running on
  options: options,
);

final hospitalStub = HospitalServerClient(clientChannel); // Handles making calls to the API on the specified clientChannel