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.map.from.js

@@ -0,0 +1,10 @@
+'use strict';
+var $ = require('../internals/export');
+var MapHelpers = require('../internals/map-helpers');
+var createCollectionFrom = require('../internals/collection-from');
+
+// `Map.from` method
+// https://tc39.github.io/proposal-setmap-offrom/#sec-map.from
+$({ target: 'Map', stat: true, forced: true }, {
+  from: createCollectionFrom(MapHelpers.Map, MapHelpers.set, true)
+});