app/views/layouts/komponent.html.erb
<!DOCTYPE html>
<html>
<head>
<title>Styleguide</title>
<%= javascript_pack_tag 'komponent' %>
<%= stylesheet_pack_tag 'komponent', media: 'all' %>
<%= csrf_meta_tags %>
</head>
<body>
<%= c 'komponent/header' %>
<%= c 'komponent/sidebar' %>
<%= c 'komponent/container' do %>
<%= yield %>
<% end %>
<%= c 'komponent/footer' %>
</body>
</html>