PWA style tweaks

webassets/service-worker.js

@@ -6,7 +6,14 @@ const CACHE_URLS = [
   'apidocs/openapi.yml',
   'about',
   'css/style.css',
-  'js/code.js',
+  'js/add-spot.js',
+  'js/alerts.js',
+  'js/bands.js',
+  'js/common.js',
+  'js/map.js',
+  'js/spots.js',
+  'js/spotsbandsandmap.js',
+  'js/status.js',
   'img/logo.png',
   'img/favicon.ico',
   'img/icon-32.png',