Fixed! Thanks for the heads-up. I'm used to writing in Korean where wrapping is rarely an issue, so I missed this during the English migration. It's updated now—thanks for the patience!

this is also a standard approach for nginx:

    location / {
      if ($http_origin ~ "^https?://(www\.)?doma.in$") {
        add_http_header Access-Control-Allow-Origin "$http_origin";
     } 
   }