TODO
- Import the likes table (likes.sql) into our DB
- write the HTML for the like button interface (index.php)
- Add the CSS for the heart button (css/style.css)
- Add the count_likes function (includes/functions.php)
- add the likes interface function (includes/functions.php)
- add the JS AJAX call when the user clicks the heart button (includes/footer.php)
- add the ajax handler PHP file to update the DB behind the scenes (ajax-handlers/like-unlike.php)