message: remove css from index.html
diff: href="<%= publicPath %>/safari-pinned-tab.svg"
  color="#5bbad5"
  />
  - <style>
  - #root {
  - min-height: 100%;
  - }
  - </style>
  <title><%= config.getString('app.title') %></title>
  <% if (config.has('app.googleAnalyticsTrackingId')) { %>
  <% } %>
  </head>
  - <body style="margin: 0">
  + <body>
  <noscript>You need to enable JavaScript to run this app.</noscript>
  <div id="root"></div>
  <!--
  