Add Vercel configuration for domain verification

domains/_vercel.gokulsk.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "gokul-sunil",
+        "email": "gokulsunil2015@gmail.com"
+    },
+    "records": {
+        "TXT": "vc-domain-verify=gokulsk.is-a.dev,38e412f5981b9decb0e3"
+    }
+}