app/views/layouts/application.html.erb
<!DOCTYPE html>
<html>
<head>
<title>Bibtexia</title>
<%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track' => true %>
<%= csrf_meta_tags %>
</head>
<body>
<nav class="navbar navbar-default navbar-static-top">
<div class="navbar-header">
<%= link_to 'Bibtexia', root_path, class: 'navbar-brand' %>
</div>
</nav>
<div class="container">
<%= yield %>
</div>
<%= javascript_include_tag 'application', 'data-turbolinks-track' => true %>
</body>
</html>