source/layouts/layout.erb
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title><%= title_translate %></title>
<meta name="description" content="<%= description_translate %>" />
<!-- Facebook Open Graph data -->
<meta property="og:title" content="<%= title_translate %>" />
<meta property="og:type" content="website" />
<meta property="og:url" content="<%= config[:host] + current_page.url %>" />
<meta property="og:image" content="<%= data.meta.image %>" />
<meta property="og:description" content="<%= description_translate %>" />
<meta property="og:site_name" content="<%= data.meta.title %>" />
<!-- Twitter Card data -->
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:site" content="<%= data.meta.twitter %>">
<meta name="twitter:title" content="<%= title_translate %>">
<meta name="twitter:description" content="<%= description_translate %>">
<meta name="twitter:creator" content="<%= data.meta.twitter %>">
<meta name="twitter:image:src" content="<%= data.meta.image %>">
<!-- Google Webmaster Tools -->
<meta name="google-site-verification" content="<%= data.meta.google %>" />
<%= stylesheet_link_tag "application" %>
</head>
<body>
<%= partial 'layouts/partials/header' %>
<%= yield %>
<%= partial 'layouts/partials/footer' %>
<%= javascript_include_tag "all" %>
</body>
</html>