index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
  <title>Github App</title>
</head>
<body>
  <div class="container mt-4">
    <div class="row">
      <div class="col-md-6 m-auto p-3 border">
        <h1 class="text-center display-4">Github Users</h1>
        <ul id="users" class="list-group"></ul>
      </div>
    </div>
  </div>

  <script src="js/main.js"></script>
</body>
</html>