And packaged as a docker container to run daily, weekly, or monthly backups. https://github.com/boredazfcuk/docker-icloudpd

I have no idea why you're getting downvoted. The icloud-photos-downloader is an amazing tool. I run it from a monthly cronjob to have a local backup in case icloud iexplodes.

Sadly this doesn't work with end-to-end encryption enabled.