accessibility improvements

see: https://make.wordpress.org/accessibility/handbook/markup/post-excerpts-for-an-archive-template/

partials/archive.php

@@ -10,12 +10,15 @@
 
 echo '<article class="post-summary">';
 
+	echo '<a class="entry-image-link" href="' . get_permalink() . '" tabindex="-1" aria-hidden="true">' . get_the_post_thumbnail( get_the_ID(), 'medium' ) . '</a>';
+
 	echo '<header class="entry-header">';
 		echo '<h2 class="entry-title"><a href="' . get_permalink() . '">' . get_the_title() . '</a></h2>';
 	echo '</header>';
 
 	echo '<div class="entry-content">';
 		the_excerpt();
+		echo '<p><a class="read-more" href="' . get_permalink() . '" tabindex="-1" aria-hidden="true">Read More<span class="screen-reader-text"> of ' . get_the_title() . '</span></a></p>';
 	echo '</div>';
 
 echo '</article>';