Add logging and toasts

src/main/resources/templates/broadcast.html

@@ -12,6 +12,7 @@
 <script th:inline="javascript">
     const broadcaster = /*[[${broadcaster}]]*/ '';
 </script>
+<script src="/js/toast.js"></script>
 <script src="/js/broadcast.js"></script>
 </body>
 </html>