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/es.object.define-getter.js

@@ -0,0 +1,17 @@
+'use strict';
+var $ = require('../internals/export');
+var DESCRIPTORS = require('../internals/descriptors');
+var FORCED = require('../internals/object-prototype-accessors-forced');
+var aCallable = require('../internals/a-callable');
+var toObject = require('../internals/to-object');
+var definePropertyModule = require('../internals/object-define-property');
+
+// `Object.prototype.__defineGetter__` method
+// https://tc39.es/ecma262/#sec-object.prototype.__defineGetter__
+if (DESCRIPTORS) {
+  $({ target: 'Object', proto: true, forced: FORCED }, {
+    __defineGetter__: function __defineGetter__(P, getter) {
+      definePropertyModule.f(toObject(this), P, { get: aCallable(getter), enumerable: true, configurable: true });
+    }
+  });
+}