Add /up for Kamal health check

Author: Layoric

BlazorDiffusion.ServiceInterface/MyServices.cs

@@ -95,4 +95,9 @@ public async Task<object> Any(UpdateUserProfile request)
             Avatar = request.Avatar ?? userInfo.Avatar,
         };
     }
+
+    public object Get(KamalUp request)
+    {
+        return new KamalUpResponse();
+    }
 }

BlazorDiffusion.ServiceModel/Kamal.cs

@@ -0,0 +1,12 @@
+using ServiceStack;
+
+namespace BlazorDiffusion.ServiceModel;
+
+[Route("/up")]
+public class KamalUp : IGet, IReturn<KamalUpResponse>
+{
+}
+
+public class KamalUpResponse
+{
+}