update: 添加样式文件的cdn

views/header.ejs

@@ -33,6 +33,7 @@
       <link href="<%- this.builtInCdnUrl %>/google-fonts/exo-2.css" rel="stylesheet">
     <% } %>
     <script src="<%- lib('jquery/3.3.1/jquery.min.js') %>"></script>
+    <link href="https://cdn.bootcss.com/element-ui/2.13.0/theme-chalk/index.css" rel="stylesheet">
     <!-- 引入组件库 -->
     <script src="https://cdn.jsdelivr.net/npm/vue"></script>
     <script src="https://cdn.bootcss.com/element-ui/2.13.0/index.js"></script>