Add nested records for domain verification

domains/mickychog.json

@@ -5,5 +5,12 @@
   },
   "records": {
     "CNAME": "portfolio-mickychog.vercel.app"
+  },
+  "nested": {
+    "_vercel": {
+      "records": {
+        "TXT": "vc-domain-verify=mickychog.is-a.dev,5e04327d1e0043551b23"
+      }
+    }
   }
 }