Add jimin.json for domain configuration

domains/jimin.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "j243kim",
+        "email": "rainbow604034@gmail.com"
+    },
+    "records": {
+        "CNAME": "custom-domains.chatgpt.site."
+    }
+}