CreateWebHost.cs

private static IWebHost CreateWebHost()
{
    var scheme = Environment.GetEnvironmentVariable("SCHEME");
    if (string.IsNullOrWhiteSpace(scheme))
    {
        scheme = "http";
    }

    var port = Environment.GetEnvironmentVariable("PORT");
    if (string.IsNullOrWhiteSpace(port))
    {
        port = "5000";
    }

    var host = new WebHostBuilder()
        .UseKestrel()
        .UseContentRoot(Directory.GetCurrentDirectory())
        .UseIISIntegration()
        .UseStartup<Startup>()
        .UseUrls($"{scheme}://0.0.0.0:{port}")
        .Build();

    return host;
}