Attempt to purge the old site with a self-destructing service worker

Author: BrianMitchL

public/sw.js

@@ -0,0 +1,16 @@
+// cleanup old Gatsby ServiceWorkers
+// https://github.com/NekR/self-destroying-sw
+self.addEventListener('install', function (e) {
+  self.skipWaiting();
+});
+
+self.addEventListener('activate', function (e) {
+  self.registration
+    .unregister()
+    .then(function () {
+      return self.clients.matchAll();
+    })
+    .then(function (clients) {
+      clients.forEach((client) => client.navigate(client.url));
+    });
+});