fix options

sw.js

@@ -1,3 +1,26 @@
-self.addEventListener('push', () => {
-  self.registration.showNotification('Hello world!', options);
+self.addEventListener('push', function(e) {
+  var options = {
+    body: 'This notification was generated from a push!',
+    icon: 'images/example.png',
+    vibrate: [100, 50, 100],
+    data: {
+      dateOfArrival: Date.now(),
+      primaryKey: '2'
+    },
+    actions: [
+      {
+        action: 'explore',
+        title: 'Explore this new world',
+        // icon: 'images/checkmark.png'
+      },
+      {
+        action: 'close',
+        title: 'Close',
+        icon: 'images/xmark.png'
+      }
+    ]
+  };
+  e.waitUntil(
+    self.registration.showNotification('Hello world!', options)
+  );
 });