Revert "Squashed commit of the following:"

This reverts commit c177f0a1b3.

front/dist/resources/service-worker.js

@@ -48,14 +48,6 @@ self.addEventListener('fetch', function(event) {
     );
 });
 
-self.addEventListener('wait', function(event) {
-    //TODO wait
-});
-
-self.addEventListener('update', function(event) {
-    //TODO update
-});
-
-self.addEventListener('beforeinstallprompt', (e) => {
-    //TODO change prompt
+self.addEventListener('activate', function(event) {
+    //TODO activate service worker
 });