add validation filters

Installers/InstallFilters.cs

@@ -0,0 +1,21 @@
+using Diary.Shared;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Diary.Installers
+{
+	public static class InstallFilters
+	{
+		public static void AddFilters(this IServiceCollection services)
+		{
+			services
+				.Configure<ApiBehaviorOptions>(opt =>
+					{
+						opt.SuppressModelStateInvalidFilter = true;
+					})
+				.AddControllers(opt =>
+					{
+						opt.Filters.Add<ValidationFilter>();
+					});
+		}
+	}
+}