app/views/layouts/pages.html.erb
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="google-site-verification" content="hon4VarnogZgLqpwbwCK12g0zkNS4-V8jXyTxdPOR5o" />
<title>GitHub Classroom</title>
<%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track' => true %>
<%= csrf_meta_tags %>
<%= render 'shared/open_graph' %>
</head>
<body class="site <%= controller_name %> <%= action_name %>">
<main>
<%= render 'shared/message_of_the_day' %>
<div id="flash-messages">
<% flash.each do |type, message| %>
<%= content_tag :div, class: "flash #{primer_class_for('alert')}" do %>
<div class="container-lg text-center">
<strong><%= message %></strong>
</div>
<% end %>
<% end %>
</div>
<%= yield %>
</main>
<%= render 'shared/footer' %>
<%= javascript_include_tag 'pages' %>
</body>
</html>