index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Calculator</title>
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
<link rel="icon" type="image/png" href="/favicon-32x32.png" sizes="32x32">
<link rel="icon" type="image/png" href="/favicon-16x16.png" sizes="16x16">
<link rel="manifest" href="/manifest.json">
<link rel="mask-icon" href="/safari-pinned-tab.svg" color="#5bbad5">
<meta name="theme-color" content="#ffffff">
<meta name="format-detection" content="telephone=no">
<meta name="viewport" content="initial-scale=1, user-scalable=no">
</head>
<body>
<div id="app"></div>
<!-- built files will be auto injected -->
</body>
</html>