更新前端静态网页获取方式，放弃使用后端获取api

frontend/node_modules/workbox-precaching/src/addPlugins.ts

@@ -0,0 +1,25 @@
+/*
+  Copyright 2019 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+
+import {WorkboxPlugin} from 'workbox-core/types.js';
+import {getOrCreatePrecacheController} from './utils/getOrCreatePrecacheController.js';
+import './_version.js';
+
+/**
+ * Adds plugins to the precaching strategy.
+ *
+ * @param {Array<Object>} plugins
+ *
+ * @memberof workbox-precaching
+ */
+function addPlugins(plugins: WorkboxPlugin[]): void {
+  const precacheController = getOrCreatePrecacheController();
+  precacheController.strategy.plugins.push(...plugins);
+}
+
+export {addPlugins};