reintroduce service-worker.js

public/service-worker.js

@@ -0,0 +1,44 @@
+/* eslint-disable no-restricted-globals */
+/* global importScripts, workbox */
+
+/**
+ * Welcome to your Workbox-powered service worker!
+ *
+ * You'll need to register this file in your web app and you should
+ * disable HTTP caching for this file too.
+ * See https://goo.gl/nhQhGp
+ *
+ * The rest of the code is auto-generated. Please don't update this file
+ * directly; instead, make changes to your Workbox build configuration
+ * and re-run your build process.
+ * See https://goo.gl/2aRDsh
+ */
+
+importScripts(
+  "https://storage.googleapis.com/workbox-cdn/releases/4.3.1/workbox-sw.js",
+);
+
+importScripts("./precache-manifest.0864ba7fb5bdcceaf0ee0110af883286.js");
+
+self.addEventListener("message", (event) => {
+  if (event.data && event.data.type === "SKIP_WAITING") {
+    self.skipWaiting();
+  }
+});
+
+workbox.core.clientsClaim();
+
+/**
+ * The workboxSW.precacheAndRoute() method efficiently caches and responds to
+ * requests for URLs in the manifest.
+ * See https://goo.gl/S9QRab
+ */
+self.__precacheManifest = [].concat(self.__precacheManifest || []);
+workbox.precaching.precacheAndRoute(self.__precacheManifest, {});
+
+workbox.routing.registerNavigationRoute(
+  workbox.precaching.getCacheKeyForURL("./index.html"),
+  {
+    blacklist: [/^\/_/, /\/[^/?]+\.[^/]+$/],
+  },
+);