For beauty style
<head>
...
<link rel="stylesheet" href="./path_to_serra/dist/serra.min.css" />
...
</head>
<body>
...
<div class="sr-box wrap">
<div class="grow-1"></div>
<div class="grow-2"></div>
</div>
...
</body>npm run dev # develop
npm run build # build