Add Hello Service

TechStacks.ServiceInterface/HelloService.cs

@@ -0,0 +1,10 @@
+using ServiceStack;
+using TechStacks.ServiceModel;
+
+namespace TechStacks.ServiceInterface;
+
+public class HelloService : Service
+{
+    public object Any(Hello request) =>
+        new HelloResponse { Result = $"Hello, {request.Name}!" };
+}

TechStacks.ServiceModel/Hello.cs

@@ -0,0 +1,16 @@
+using ServiceStack;
+
+namespace TechStacks.ServiceModel;
+
+[Route("/hello")]
+[Route("/hello/{Name}")]
+public class Hello : IReturn<HelloResponse>
+{
+    public string Name { get; set; }
+}
+
+public class HelloResponse
+{
+    public string Result { get; set; }
+    public ResponseStatus ResponseStatus { get; set; }
+}