如何在谷歌云函数.NET Core3.1上启用CORS

<ItemGroup>
  <PackageReference Include="Microsoft.AspNetCore.Cors" Version="2.2.0" />
</ItemGroup>

using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddCors();
    }

    public void Configure(IApplicationBuilder app)
    {
        app.UseCors(builder =>
            builder.AllowAnyOrigin()
                   .AllowAnyMethod()
                   .AllowAnyHeader());
        
        // 其他中间件配置
    }
}

using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Hosting;

public class Function
{
    public static void Main(string[] args)
    {
        CreateHostBuilder(args).Build().Run();
    }

    public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.UseStartup<Startup>();
            });
}