Re-add channels page

src/main/resources/templates/channels.html

@@ -35,7 +35,7 @@
                             autocomplete="off"
                         />
                         <datalist id="channel-suggestions"></datalist>
-                        <button type="submit" class="button block">Open overlay</button>
+                        <button type="submit" class="button block" onclick="onOpenOverlayButtonClick(event)">Open overlay</button>
                     </form>
                 </section>
             </main>
@@ -67,5 +67,6 @@
             </footer>
         </div>
         <script src="/js/cookie-consent.js"></script>
+        <script src="/js/channels.js"></script>
     </body>
 </html>