app/views/layouts/_head.html.erb
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!--[if lt IE 9]>
<%= javascript_include_tag "conditional/html5" %>
<![endif]-->
<%= render partial: 'layouts/opengraph' %>
<%= render partial: 'layouts/twitter_card' %>
<title><%= page_title %></title>
<%= csrf_meta_tags %>
<%= stylesheet_link_tag "application", :media => "all" %>
<link href="/favicon.ico" rel="shortcut icon" />
<link href="<%= image_path 'apple-touch-icon-precomposed.png' %>" rel="apple-touch-icon-precomposed" />
<link rel="search" type="application/opensearchdescription+xml" href="<%= opensearch_path format: :xml %>"/>
<script>
var HDO = HDO || {
ssl: <%= AppConfig.ssl_enabled.to_json.html_safe %>
};
</script>
</head>