.net core 基础配置

  IWebHostBuilder builder = new WebHostBuilder();
            builder.ConfigureServices(s =>
            {
                s.AddSingleton(builder);
            });
            builder.ConfigureLogging(logging =>
            {
                logging.SetMinimumLevel(LogLevel.Warning);
            })
                .UseKestrel()
                .UseContentRoot(Directory.GetCurrentDirectory())
                .UseConfiguration(hostingconfig)
                .UseUrls(url)
                .UseStartup<Startup>();