Reduce the usage of BuildServiceProvider

src/Umbraco.Web.UI.NetCore/Startup.cs

@@ -16,13 +16,29 @@ namespace Umbraco.Web.UI.BackOffice
 {
     public class Startup
     {
+        private readonly IWebHostEnvironment _webHostEnvironment;
+        private readonly IConfiguration _config;
+
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        /// <param name="webHostEnvironment"></param>
+        /// <param name="config"></param>
+        /// <remarks>
+        /// Only a few services are possible to be injected here https://github.com/dotnet/aspnetcore/issues/9337
+        /// </remarks>
+        public Startup(IWebHostEnvironment webHostEnvironment, IConfiguration config)
+        {
+            _webHostEnvironment = webHostEnvironment ?? throw new ArgumentNullException(nameof(webHostEnvironment));
+            _config = config ?? throw new ArgumentNullException(nameof(config));
+        }
 
         // This method gets called by the runtime. Use this method to add services to the container.
         // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
         public void ConfigureServices(IServiceCollection services)
         {
-            services.AddUmbracoConfiguration();
-            services.AddUmbracoCore();
+            services.AddUmbracoConfiguration(_config);
+            services.AddUmbracoCore(_webHostEnvironment);
             services.AddUmbracoWebsite();
         }