JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<div class="container-fluid container-border">
    <div class="row">
      <div class="col-md-12"><p class="text-center">Welcome.</p></div>
    </div>
</div>
<br><br>
<div class="panel panel-default">
  <div class="panel-body">
    <p class="text-center">Welcome.</p>
  </div>
</div

CSS

.container-border{
  border: 1px solid #ccc;
  border-radius: 15px;  
}