Storefront - add a custom logo

functions.php

add_action( 'init', 'storefront_custom_logo' );
function storefront_custom_logo() {
	remove_action( 'storefront_header', 'storefront_site_branding', 20 );
	add_action( 'storefront_header', 'storefront_display_custom_logo', 20 );
}

function storefront_display_custom_logo() {
?>
	<a href="<?php echo esc_url( home_url( '/' ) ); ?>" class="site-logo-link" rel="home">
		<img src="<?php echo get_stylesheet_directory_uri(); ?>/images/logo.png" alt="<?php echo get_bloginfo( 'name' ); ?>" />
	</a>
<?php
}