fix #4562 - module template issue caused by gitignore

Oqtane.Server/wwwroot/Modules/Templates/External/Client/Startup/ClientStartup.cs

@@ -0,0 +1,14 @@
+using Microsoft.Extensions.DependencyInjection;
+using Oqtane.Services;
+using [Owner].Module.[Module].Services;
+
+namespace [Owner].Module.[Module].Startup
+{
+    public class ClientStartup : IClientStartup
+    {
+        public void ConfigureServices(IServiceCollection services)
+        {
+            services.AddScoped<I[Module]Service, [Module]Service>();
+        }
+    }
+}