public static IHostBuilder CreateHostBuilder(string[] args) =>
  Host.CreateDefaultBuilder(args)
    .ConfigureWebHostDefaults(webBuilder =>
    {
       webBuilder.ConfigureKestrel(serverOptions =>
       {
         serverOptions.ListenAnyIP(4711,
          listenOptions => {
           listenOptions.UseHttps("cert.pfx", "<password>");
          }
         );
       })
       .UseStaticWebAssets()
       .UseStartup<Startup>();
    });