app/views/layouts/application.html.erb
<!DOCTYPE html>
<html>
<head>
<title>Redeemify</title>
<%= include_gon %>
<%= stylesheet_link_tag "application",
"https://fonts.googleapis.com/icon?family=Material+Icons" %>
<%= javascript_include_tag "application" %>
<%= csrf_meta_tag %>
</head>
<body>
<%= yield %>
</body>
</html>