docs(gui): add a note for admin_gui_url

app/_src/gateway/kong-manager/enable.md

@@ -6,6 +6,13 @@ If you're running {{site.base_gateway}} with a database (either in traditional
 or hybrid mode), you can enable {{site.base_gateway}}'s graphical user interface
 (GUI), Kong Manager.
 
+{:.note}
+> **Note**: To configure Kong Manager to be accessible from multiple domains, you can list the domains as comma-separated values and assign them to the admin_gui_url parameter in your Kong configuration. Here's an example:
+  ```text
+  admin_gui_url = http://localhost:8002, http://127.0.0.1:8002
+  ```
+> Make sure that each domain has proper DNS records and that the Kong instance is accessible from all specified domains.
+
 {% navtabs %}
 {% navtab Docker %}