Refresh function for main frontend, separate main frontends for normal countdown and score+countdown

scoreboard/public/javascripts/index.js

@@ -12,4 +12,8 @@ socket.on('timerDurationLeft', (message) => {
 
 socket.on('timerEnded', (message) => {
     document.getElementById("durationLeft").innerHTML = "ENDE";     // Display "STOP" in same html element as the duration
+});
+
+socket.on('refresh', (message) => {
+    document.location.reload()                                      // Reload page on received 'refresh' messagen
 });