feat: add PWA support

static/service-worker.js

@@ -0,0 +1,23 @@
+const cacheName = 'v1';
+
+const cacheAssets = [
+  '/',
+  '/index.html',
+  '/style.css',
+  // 可以添加其他需要缓存的资源路径
+];
+
+self.addEventListener('install', e => {
+  e.waitUntil(
+    caches.open(cacheName).then(cache => {
+      console.log('Caching files...');
+      return cache.addAll(cacheAssets);
+    })
+  );
+});
+
+self.addEventListener('fetch', e => {
+  e.respondWith(
+    fetch(e.request).catch(() => caches.match(e.request))
+  );
+});