app.html

<!DOCTYPE html>
<html {{ HTML_ATTRS }}>

  <head {{ HEAD_ATTRS }}>
    {{ HEAD }}
    <link rel="apple-touch-icon" sizes="57x57" href="/favicon/apple-icon-57x57.png">
    <link rel="apple-touch-icon" sizes="60x60" href="/favicon/apple-icon-60x60.png">
    <link rel="apple-touch-icon" sizes="72x72" href="/favicon/apple-icon-72x72.png">
    <link rel="apple-touch-icon" sizes="76x76" href="/favicon/apple-icon-76x76.png">
    <link rel="apple-touch-icon" sizes="114x114" href="/favicon/apple-icon-114x114.png">
    <link rel="apple-touch-icon" sizes="120x120" href="/favicon/apple-icon-120x120.png">
    <link rel="apple-touch-icon" sizes="144x144" href="/favicon/apple-icon-144x144.png">
    <link rel="apple-touch-icon" sizes="152x152" href="/favicon/apple-icon-152x152.png">
    <link rel="apple-touch-icon" sizes="180x180" href="/favicon/apple-icon-180x180.png">
    <link rel="icon" type="image/png" sizes="192x192"  href="/favicon/android-icon-192x192.png">
    <link rel="icon" type="image/png" sizes="32x32" href="/favicon/favicon-32x32.png">
    <link rel="icon" type="image/png" sizes="96x96" href="/favicon/favicon-96x96.png">
    <link rel="icon" type="image/png" sizes="16x16" href="/favicon/favicon-16x16.png">
    <link rel="manifest" href="/favicon/manifest.json">
    <meta name="msapplication-TileColor" content="#000000">
    <meta name="msapplication-TileImage" content="/favicon/ms-icon-144x144.png">
    <meta name="theme-color" content="#000000">
  </head>

  <body {{ BODY_ATTRS }}>
    {{ APP }}
    <div id="canvas"></div>
  </body>

</html>