<div class="container doc-customer-container">
  <p>Date: <input type="text" id="datepicker"></p>
</div>
.doc-customer-container{
  padding-top:20px;
}
$( function() {
    $( "#datepicker" ).datepicker({ 
      minDate: 0, 
      maxDate: 28
    });
  } );

External CSS

  1. https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css
  2. //code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js
  2. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.0/jquery.min.js
  3. https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.0/jquery-ui.min.js