diff --git a/pwa-mat/service-worker.js b/pwa-mat/service-worker.js
new file mode 100644
index 0000000..9c26059
--- /dev/null
+++ b/pwa-mat/service-worker.js
@@ -0,0 +1,23 @@
+/**
+ * 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/3.6.3/workbox-sw.js");
+
+/**
+ * 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.suppressWarnings();
+workbox.precaching.precacheAndRoute(self.__precacheManifest, {});