Added Test echo posting

Controllers/TestPosting.cs

@@ -0,0 +1,17 @@
+using Microsoft.AspNetCore.Mvc;
+using System.Text.Json;
+
+namespace NeDvachAPI.Controllers
+{
+    [ApiController]
+    [Route("[controller]")]
+    public class TestPostingController : ControllerBase
+    {
+        [HttpPost(Name = "TestPostPosts")]
+        public Post ReceivePost([FromBody] Post ReceivedPost)
+        {
+            //DBchat.SendPost(ReceivedPost);
+            return ReceivedPost;
+        }
+    }
+}