Chore: add script to site that remove service-worker (#2047)

Author: ota-meshi

docs/.vitepress/public/service-worker.js

@@ -0,0 +1,14 @@
+// https://github.com/NekR/self-destroying-sw
+/* globals self */
+self.addEventListener('install', (e) => {
+  self.skipWaiting()
+})
+
+self.addEventListener('activate', (e) => {
+  self.registration
+    .unregister()
+    .then(() => self.clients.matchAll())
+    .then((clients) => {
+      for (const client of clients) client.navigate(client.url)
+    })
+})