init from origin + update

server/routers/uryndyklar/mocks/cart_post/error.json

@@ -0,0 +1,4 @@
+{
+    "success": false,
+    "message": "Unknown action: not_add_or_remove"
+}

server/routers/uryndyklar/mocks/cart_post/success.json

@@ -0,0 +1,3 @@
+{
+    "success": true
+}