funky/_includes/header.html

<header class="header">

	<a href="{{ page.url }}" title="{{ page.title }}">

			<img class="avatar" src="{{ site.logo | replace: "300", "72" }}" alt="{{ site.title }}" srcset="{{ site.logo | replace: "300", "72" }}  72w, {{ site.logo | replace: "300", "144" }} 144w" width="72" height="72">

	</a>

	{% include nav.html %}

	<div class="container">

		<h1>{{ page.title }}</h1>

	</div>

</header>