Replace nancy with kestrel

Geekbot.net/WebApi/Controllers/Status/ApiStatusDto.cs

@@ -0,0 +1,9 @@
+namespace Geekbot.net.WebApi.Controllers.Status
+{
+    public class ApiStatusDto
+    {
+        public string GeekbotVersion { get; set; }
+        public string ApiVersion { get; set; }
+        public string Status { get; set; }
+    }
+}

Geekbot.net/WebApi/Controllers/Status/StatusController.cs

@@ -0,0 +1,22 @@
+using Geekbot.net.Lib;
+using Microsoft.AspNetCore.Cors;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Geekbot.net.WebApi.Controllers.Status
+{
+    [EnableCors("AllowSpecificOrigin")]
+    public class StatusController : Controller
+    {
+        [Route("/")]
+        public IActionResult GetCommands()
+        {
+            var responseBody = new ApiStatusDto
+            {
+                GeekbotVersion = Constants.BotVersion(),
+                ApiVersion = Constants.ApiVersion.ToString(),
+                Status = "Online"
+            };
+            return Ok(responseBody);
+        }
+    }
+}