[Theme: Hey Cookie] Linking Site Logo to Homepage

Hi,

I’m customizing the Hey Cookie theme for my site using a child theme. I have it just about all the way there but can’t seem to figure out how to link my logo to my home page.

Here’s the line of code from my header.php file that links to the site logo:
<img class="site-logo" src="<?php echo get_stylesheet_directory_uri(); ?>/images/logo.png" alt="site logo" />

Is there a string of code I can add to that line that should do link it to the homepage?

Here is a link to my site: