Edit your htaccess file.
This alone will redirect your root o the public folder.
If you have a lot inside of your htaccess file. Be careful while adding stuff. Ensure you keep a backup before editing and test the addition of the code inside the htaccess file.
<IfModule mod_rewrite.c> RewriteEngine on RewriteCond %{REQUEST_URI} !^public RewriteRule ^(.*)$ public/$1 [L] </IfModule>