my $sslSocket = IO::Socket::SSL->new(
    Listen             => 5,
    LocalPort          => XXXX,
    Proto              => 'tcp',
    SSL_server         => 1,
    SSL_startHandshake => 1,
    SSL_cert_file      => 'CRT',
    SSL_key_file       => 'KEY',
    ReuseAddr          => 1,
    Blocking           => 0
  );

##</code><code>##

  my $server = Net::Async::WebSocket::Server->new(
    ...
  );

##</code><code>##

  my $loop = IO::Async::Loop->new;
  $loop->add( $server );

  $server->listen(
    handle => $sslSocket
  )->get;

##</code><code>##

  while($loop->loop_once(0.0001) > 0) {
  };