Added join button for manully triggering the bot

client/web/index.html

@@ -25,6 +25,8 @@
                     <button type="submit" class="btn btn-primary btn-block">Upload</button>
                 </form>
 
+                <button id="joinButton" class="btn btn-info btn-block">Join</button>
+
                 <div id="nextPlaybackTime" class="mb-4">
                     Endpoint not loading!?
                 </div>