dev.html

<!DOCTYPE HTML>
<html>
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Bohdilang</title>
  <script src="dev.js"></script>
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
  <link rel="icon" href="data:;base64,iVBORwOKGO=" />
  <style>
    .btn:focus, .btn:active {
      outline: none !important;
      box-shadow: none !important;
      -webkit-box-shadow: none !important;
    }
    .btn {
      min-width: 80px;
    }
    footer {
      text-align: center;
      margin-top: 10px;
    }
  </style>
</head>
<body>
  <div id="app"></div>
  <script>
    Elm.Main.init({
      node: document.getElementById("app")
    })
  </script>
</body>
</html>