app/views/layouts/application.html.erb
<!DOCTYPE html>
<html>
<head>
<title>Census</title>
<%= csrf_meta_tags %>
<%= stylesheet_link_tag 'application', media: 'all' %>
<%= javascript_include_tag 'application' %>
</head>
<body>
<%= render '/shared/navbar' %>
<%= render '/shared/flash' %>
<div class='container'>
<%= yield %>
</div>
</body>
</html>