Add _vercel.dai.json for domain verification

domains/_vercel.dai.json

@@ -0,0 +1,14 @@
+{
+  "repo": "https://github.com/ncdai/chanhdai.com",
+  "owner": {
+    "username": "ncdai",
+    "email": "dai@chanhdai.com"
+  },
+  "target": {
+    "TXT": {
+      "name": "_vercel.dai",
+      "value": "vc-domain-verify=dai.is-a-good.dev,29b5ad1e12be91f00a7a"
+    }
+  },
+  "proxied": false
+}