Add Vercel configuration for domain verification

domains/_vercel.elmehdielkabia.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "ElmehdiElkabia",
+    "email": "elmehdielkabia@gmail.com"
+  },
+  "records": {
+    "TXT": "vc-domain-verify=elmehdielkabia.is-a.dev,2c7067441e6108baf6b1"
+  }
+}