更新前端静态网页获取方式，放弃使用后端获取api

frontend/node_modules/core-js/modules/esnext.function.un-this.js

@@ -0,0 +1,10 @@
+'use strict';
+var $ = require('../internals/export');
+var demethodize = require('../internals/function-demethodize');
+
+// `Function.prototype.unThis` method
+// https://github.com/js-choi/proposal-function-demethodize
+// TODO: Remove from `core-js@4`
+$({ target: 'Function', proto: true, forced: true, name: 'demethodize' }, {
+  unThis: demethodize
+});