First commit

public/push-sw.js

@@ -0,0 +1,19 @@
+/* global self */
+
+self.addEventListener('push', (event) => {
+  const payload = event.data?.json?.() ?? {
+    title: 'CertRemind',
+    body: '証明書に関する通知があります',
+  };
+
+  event.waitUntil(
+    self.registration.showNotification(payload.title || 'CertRemind', {
+      body: payload.body || '証明書に関する通知があります',
+    }),
+  );
+});
+
+self.addEventListener('notificationclick', (event) => {
+  event.notification.close();
+  event.waitUntil(self.clients.openWindow('/'));
+});