feat: initpage com sync Go + auth + frontend em web/

web/sw.js

@@ -0,0 +1,41 @@
+const CACHE = "initpage-v4";
+const ASSETS = [
+  "./",
+  "./index.html",
+  "./styles.css",
+  "./app.js",
+  "./ads.js",
+  "./manifest.json",
+  "./icon.svg",
+  "./robots.txt"
+];
+
+self.addEventListener("install", (event) => {
+  event.waitUntil(
+    caches.open(CACHE).then((cache) => cache.addAll(ASSETS)).catch(() => {})
+  );
+  self.skipWaiting();
+});
+
+self.addEventListener("activate", (event) => {
+  event.waitUntil(
+    caches.keys().then((keys) => Promise.all(keys.filter((k) => k !== CACHE).map((k) => caches.delete(k))))
+  );
+  self.clients.claim();
+});
+
+self.addEventListener("fetch", (event) => {
+  if (event.request.method !== "GET") return;
+  event.respondWith(
+    caches.match(event.request).then((cached) => {
+      const fetchPromise = fetch(event.request).then((response) => {
+        if (response && response.status === 200 && response.type === "basic") {
+          const clone = response.clone();
+          caches.open(CACHE).then((cache) => cache.put(event.request, clone));
+        }
+        return response;
+      }).catch(() => cached);
+      return cached || fetchPromise;
+    })
+  );
+});