What a mess

pwa/public/sw.js

@@ -0,0 +1,19 @@
+const CACHE_NAME = 'echoes-of-the-ash-v1';
+const urlsToCache = [
+  '/',
+  '/index.html'
+];
+
+self.addEventListener('install', (event) => {
+  event.waitUntil(
+    caches.open(CACHE_NAME)
+      .then((cache) => cache.addAll(urlsToCache))
+  );
+});
+
+self.addEventListener('fetch', (event) => {
+  event.respondWith(
+    caches.match(event.request)
+      .then((response) => response || fetch(event.request))
+  );
+});