I'm using Laravel 5.4. in my routes folder in web.php I have written the code below:
Route::get('test', function () {
    return view('test');
});
And also I have created test.blade.php inside resources/views. in this file i have a simple layout:  
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Testing Bootstrap</title>
  </head>
  <body>
    <div class="container bg-danger">
      <p>This is a paragraph</p>
    </div>
  </body>
</html>
In order to access this page I simply use localhost:8000/test url.
the page loads successfully, but bootstrap classes like container and bg-danger are not affected. why? How can I use bootstrap features inside a laravel blade template?