html--node--preview.html.twig in Open Social 8.7

<!DOCTYPE html>
<html{{ html_attributes }}>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta charset="utf-8">
    <head-placeholder token="{{ placeholder_token|raw }}">
    <title>{{ head_title|safe_join(' | ') }}</title>
    <css-placeholder token="{{ placeholder_token|raw }}">
    <js-placeholder token="{{ placeholder_token|raw }}">
  </head>
  <body{{ attributes.addClass('page-preview') }}>
    <a href="#main-content" class="sr-only sr-only-focusable">
      {{ 'Skip to main content'|t }}
    </a>
    {{ page_top }}
    {{ page }}
    {{ page_bottom }}
    <js-bottom-placeholder token="{{ placeholder_token|raw }}">

  </body>
</html>