6. Verify everything work by running `cd ~/dn42/dn42-rpki-export.json-test/ && php roagen.php && php rfc8416.php`.
7. In $USER crontab file put `44 */3 * * * cd ~/dn42/dn42-rpki-export.json-test/ && php roagen.php && php rfc8416.php`. Finetune time between runs to your liking.