nice refactorings

PracticeCalendar.Application/ConfigureServices.cs

@@ -0,0 +1,18 @@
+using MapsterMapper;
+using MediatR;
+using Microsoft.Extensions.DependencyInjection;
+using System.Reflection;
+
+namespace PracticeCalendar.Application
+{
+    public static class ConfigureServices
+    {
+        public static IServiceCollection AddApplicationServices(this IServiceCollection services)
+        {
+            services.AddSingleton<IMapper>(new Mapper(new Mapster.TypeAdapterConfig()));
+            services.AddMediatR(Assembly.GetExecutingAssembly());
+
+            return services;
+        }
+    }
+}