Create sw.js

src/static/sw.js

@@ -0,0 +1,20 @@
+const CACHE_NAME = 'quantvat-v1';
+const ASSETS = [
+  '/',
+  '/static/css/base.css',
+  'https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;800&display=swap'
+];
+
+self.addEventListener('install', (event) => {
+  event.waitUntil(
+    caches.open(CACHE_NAME).then((cache) => cache.addAll(ASSETS))
+  );
+});
+
+self.addEventListener('fetch', (event) => {
+  event.respondWith(
+    caches.match(event.request).then((response) => {
+      return response || fetch(event.request);
+    })
+  );
+});