Add AddAppServices method

src/Nocr.TelegramClient.AppServices/ServiceCollectionExtensions.cs

@@ -0,0 +1,16 @@
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Nocr.TelegramClient.AppServices;
+
+public static class ServiceCollectionExtensions
+{
+    public static IServiceCollection AddAppServices(this IServiceCollection services)
+    {
+        if (services == null) 
+            throw new ArgumentNullException(nameof(services));
+
+        // Add registrations here
+        
+        return services;
+    }
+}

src/Nocr.TelegramClient.Host/Infrastructure/Startup.cs

@@ -29,6 +29,7 @@ public class Startup
                 .WithOptions(opt => opt.FromConfiguration(Configuration))
                 .WithPolling(polling => polling.WithExceptionHandler<LoggingPollingExceptionHandler>()));
         services.AddTelegramBotHandling(typeof(BotClient).Assembly);
+        services.AddAppServices();
     }
 
     public void Configure(IApplicationBuilder app)