<meta charset="utf-8">

<title>{{title}}</title>

<meta name="robots" content="{{seo.robots}}">
<link rel="canonical" href="{{seo.canonical}}" />
<meta property="og:url" content="{{seo.canonical}}" />
<meta property="og:title" content="{{seo.ogp.title}}" />

{{#if seo.ogp.type}}
<meta property="og:type" content="{{seo.ogp.type}}" />
{{else}}
<meta property="og:type" content="website" />
{{/if}}
{{#if seo.ogp.image}}
<meta property="og:image" content="{{seo.ogp.image}}" />
{{/if}}

Add reference seo header example.
Add reference seo header example.

reviewed-by: ben, chrisf
