I installed Nextcloud on a Ubuntu 18 droplet. Its working. Where can I find the apache log file?

I have checked the locations below and the log file is not present
/var/log/
/snap/nextcloud/current/logs

I followed this guide:
https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-nextcloud-on-ubuntu-18-04

Thank you
Hrishi