Install Debian 9.6

Install LAMP:

           https://www.digitalocean.com/community/tutorials/how-to-install-linux-apache-mariadb-php-lamp-stack-debian9

Setup certificates as per: Certificate - Let's Encrypt   Apache for ZoneMinder

Install Owncloud 9:

https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-owncloud-on-debian-9

apt install curl apt-transport-https

curl https://download.owncloud.org/download/repositories/production/Debian_9.0/Release.key | apt-key add 

echo 'deb http://download.owncloud.org/download/repositories/production/Debian_9.0/ /' | tee /etc/apt/sources.list.d/owncloud.list

apt update

apt install php-bz2 php-curl php-gd php-imagick php-intl php-mbstring php-xml php-zip owncloud-files

Remote WebDav

I don't know... I think I reconfigured so much it got confused.  I had to create a new entry and then it worked.

Remote: https://nas.politick.ca:8081/homephoto/

Leave Remote Subfolder empty

Check Secure https://

Use Username and Password as Authentication and put nas' WEbdav credentials, also in cloud entry notes  in KeePass