change pwa config

.idea/misc.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="JavaScriptSettings">
-    <option name="languageLevel" value="ES6" />
+    <option name="languageLevel" value="JS_1_8_5" />
   </component>
   <component name="NodePackageJsonFileManager">
     <packageJsonPaths />

schoolapps/static/common/serviceworker.js

@@ -17,7 +17,11 @@ const avoidCachingPaths = [
     '/settings/',
     '/support/',
     '/faq/ask/',
-    '/aub/',
+    '/aub/apply_for/',
+    '/aub/check1/',
+    '/aub/check2/',
+    '/aktuell.pdf',
+    '/timetable/aktuell.pdf',
 ];
 
 function pathComparer(requestUrl, pathRegEx) {