New: Use ASP.NET Core instead of Nancy

Co-Authored-By: ta264 <ta264@users.noreply.github.com>

frontend/src/Store/Actions/commandActions.js

@@ -145,7 +145,8 @@ export function executeCommandHelper(payload, dispatch) {
   const promise = createAjaxRequest({
     url: '/command',
     method: 'POST',
-    data: JSON.stringify(requestPayload)
+    data: JSON.stringify(requestPayload),
+    dataType: 'json'
   }).request;
 
   return promise.then((data) => {