Update index.js

better solution from @mikecao, it's not dependent on script name

tracker/index.js

@@ -17,7 +17,7 @@ import { post, hook, doNotTrack } from '../lib/web';
   if (!script || (__DNT__ && doNotTrack())) return;
 
   const website = script.getAttribute('data-website-id');
-  const hostUrl = new URL(script.src).href.replace(/\/umami\.js$/,'');
+  const hostUrl = new URL(script.src).href.split('/').slice(0, -1).join('/');
   const screen = `${width}x${height}`;
   const listeners = [];