Just deploy this image and browse webpage of your new deployemnt to get detailed manual.
All passwords: Mama101%
1. DKIM now is working properly 2. Security improvement! 3. Postfix reconfiguration to remove sensitive headers like X-PHP-Originating-Script List-Help while sending emails from PHPLIST. 4. PhpList Subscription page available without login (without htaccess). 5. Improved Support for Let's Encrypt - Free SSL/TLS Certificates