Adjust old sw.js file to remove itself, allowing new service-worker.js to be activated

static/sw.js

@@ -0,0 +1,16 @@
+// Remove the service worker /sw.js from legacy installations
+// This should then enable the new /service-worker.js to be installed
+
+self.addEventListener('activate', function (e) {
+  console.log(`Unregistering service worker`)
+  self.registration.unregister()
+    .then(function () {
+      return self.clients.matchAll();
+    })
+    .then(function (clients) {
+      clients.forEach(client => {
+        console.log(`Navigating ${client.url}`)
+        client.navigate(client.url)
+      })
+    });
+});