Merge pull request #6556 from caodoc/main

BETA: Register caodoc.is-a.dev

domains/caodoc.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "caodoc",
+        "email": "dochicao2306@gmail.com"
+    },
+    "record": {
+        "CNAME": "caodoc.github.io"
+    }
+}