syncing-ampache-on-cloudron-to-a-local-folder
I found this webdav + wget setup that looked promising: https://askubuntu.com/questions/892118/rsync-from-unmounted-webdav-source
No wget on default MacOS, so brew install wget and from the linked page:
wget -m --user=admin --password=<access key from surfer> https://your-cloudron-surfer-domain/_webdav/music -np -P /path/to/local/backup
Got Error 405 and didn’t seem fixable.
Searched for rsync options, and got some tips that rclone might be better for webdav, so installed that.
brew install rclone
Following https://rclone.org/webdav/, set up a config for the Surfer WebDav on Cloudron and named it something, eg. save-rclone-config,
While in the local directory for backups, running rclone copy save-rclone-config:music .