Add Vercel configuration for heinz domain

domains/_vercel.heinz.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "roy-heinrich",
+        "email": "royheinrich.delgado0@gmail.com"
+    },
+    "records": {
+        "TXT": "vc-domain-verify=heinz.is-a.dev,4f53b6e446d895d868e1"
+    }
+}