Merge pull request #51666 from khoadoan2008/main

Add khoadoan.is-a.dev

domains/khoadoan.json

@@ -0,0 +1,9 @@
+    {
+      "owner": {
+        "username": "khoadoan2008",
+        "email": "doancongkhoa2008@gmail.com"
+      },
+      "records": {
+        "CNAME": "khoadoan2008.github.io"
+      }
+    }