Try something

Author: mkuratczyk

deps/rabbitmq_management/priv/www/index.html

@@ -18,14 +18,14 @@
       scripts.forEach((script) => {
         tag = document.createElement('script');
         tag.src = 'js/' + script + '?v=' + management_version;
-        document.head.appendChild(tag);
+        document.currentScript.parentNode.insertBefore(tag, document.currentScript.nextSibling);
       });
 
       tag = document.createElement('link');
       tag.rel = 'stylesheet';
       tag.type = 'text/css';
       tag.href = 'css/main.css?v=' + management_version;
-      document.head.appendChild(tag);
+      document.currentScript.parentNode.insertBefore(tag, document.currentScript.nextSibling);
     </script>
 
     <script src="js/oidc-oauth/bootstrap.js" type="module"></script>