如何在发布时创建静态文件夹？

Question

我需要使用其他静态文件夹，所以我在Startup.cs中添加了app.UseStaticFiles（new StaticFileOptions {}）：

namespace DailyAnlytics
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();
        }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseBrowserLink();
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Error");
            }

            app.Use(async (context, next) =>
            {
               //...
            });

            app.UseDefaultFiles();
            app.UseStaticFiles();
            app.UseStaticFiles(new StaticFileOptions
            {
                FileProvider = new PhysicalFileProvider(
                Path.Combine(Directory.GetCurrentDirectory(), "Mycustomfolder")),
                RequestPath = "/Mycustomfolder"
            });

            app.UseMvc(routes =>
            {
                routes.MapRoute("default", "main{controller}/{action?}/{id?}");
            });
        }
    }
}

如果发布目录中没有文件夹Mycustomfolder，则应用程序不会启动。如果该文件夹不存在，应如何使应用程序创建该文件夹？