border.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Hello Bootstrap</title>
    <link href="bootstrap/css/bootstrap.css" rel="stylesheet">
</head>
<body>

<div class="m-5 p-2 bg-danger-subtle border border-bottom-0 border-danger border-4 rounded rounded-4">
    Lorem ipsum dolor sit amet, consectetur adipisicing elit. Consequatur ducimus earum inventore optio vitae. Consequuntur cupiditate ea est iste minus nihil, nulla officiis placeat quo quos ratione repellendus vel voluptatum?
</div>

<script src="bootstrap/js/bootstrap.bundle.min.js"></script>
</body>
</html>