How to? Clicking an image on attachment.php leads back to home page

Sample post: https://www.celebslam.com/lunch-with-katharine-mcphee/katherine-mcphee-loves-her-breasts-as-much-as-i-do/

I’d like to make is so that someone can click the image and it will take them back to the homepage (or even better–the post where the image came from).

Here’s the code I use for the image on the attachment.php:

<img src=”<?php echo $post->guid; ?>” alt=”<?php the_title(); ?>” title=”<?php the_title(); ?>” />

Thanks in advance for any help!