chore: update default html title;

public/index.html

@@ -5,7 +5,7 @@
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width,initial-scale=1.0">
     <link rel="icon" href="<%= BASE_URL %>favicon.ico">
-    <title><%= htmlWebpackPlugin.options.title %></title>
+    <title><%= process.env.VUE_APP_NAME %></title>
     <!-- require cdn assets css -->
     <% for (var i in htmlWebpackPlugin.options.cdn && htmlWebpackPlugin.options.cdn.css) { %>
       <link rel="stylesheet" href="<%= htmlWebpackPlugin.options.cdn.css[i] %>" />