add predered routes to cache

frontend/src/sw.ts

@@ -3,14 +3,15 @@
 /// <reference lib="esnext" />
 /// <reference lib="webworker" />
 
-import { build, files, version } from '$service-worker';
+import { build, files, version, prerendered } from '$service-worker';
 
 // Create a unique cache name for this deployment
 const CACHE = `sw-cache-${version}`;
 
 const ASSETS = [
     ...build, // the app itself
-    ...files  // everything in `static`
+    ...files, // everything in `static`,
+    ...prerendered // dynamic routes
 ];
 
 self.addEventListener('install', (event) => {