Add Vercel domain verification configuration

domains/_vercel.sandun.json

@@ -0,0 +1,12 @@
+{
+  "owner": {
+    "username": "sandunMadhushan",
+    "email": "sandunhmadushan9330@gmail.com"
+  },
+  "records": {
+    "TXT": [
+      "vc-domain-verify=sandun.is-a.dev,e37c44d5c1fe152a770b",
+      "vc-domain-verify=www.sandun.is-a.dev,de461728274a0cb4e1d9"
+    ]
+  }
+}