app/views/layouts/application.html.erb
<!DOCTYPE html>
<html>
<head>
<%= display_meta_tags(default_meta) %>
<%= csrf_meta_tags %>
<%= stylesheet_link_tag *webpack_asset_paths('application', extension: 'css') %>
<%= javascript_include_tag *webpack_asset_paths('application', extension: 'js') %>
</head>
<body>
<div class='flex-body'>
<%= render partial: 'layouts/header' %>
<main>
<div class='container'>
<%= render partial: 'layouts/flash' %>
<%= yield %>
</div>
</main>
<%= render partial: 'layouts/footer' %>
</div>
</body>
</html>