Add Vercel domain configuration for at6.is-a.dev

domains/_vercel.at6.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "graphicsprocessingunit",
+        "email": "AT656.dev@proton.me"
+    },
+    "records": {
+        "TXT": "vc-domain-verify=at6.is-a.dev,e5d00496ea1abcd2a120"
+    }
+}