如何从Asp.NET Core 3.1启动类访问launchSettings.json中的`applicationUrl`属性？

using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using System;

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

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureAppConfiguration((context, config) =>
                {
                    var env = context.HostingEnvironment;
                    if (env.IsDevelopment())
                    {
                        config.AddJsonFile("Properties/launchSettings.json", optional: true, reloadOnChange: true);
                    }
                })
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });

        public static string GetApplicationUrl(IConfiguration configuration)
        {
            var environmentName = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT");
            var profile = configuration.GetSection("profiles").GetProfiles().FirstOrDefault(p => p.Name == environmentName);

            if (profile != null && profile.Properties.ContainsKey("applicationUrl"))
            {
                return profile.Properties["applicationUrl"].Value.ToString();
            }

            return null;
        }
    }
}