Ok, thanks. I think that the combo Immich and icloudpd seems to be a way forward for now as that combo seems to be able to download iCloud files to local (my server) and delete them from iCloud. Once on my server I can move them to Immich and that should just about be it. Famous last words, I know, but I think it will be fine.
Used to mess around with multiple Apache Proxy Servers. When I left that job I found Docker and (amongst other things) NPM and I swear, I stared at the screen in disbelief on how easy the setup and config was. All that time we wasted on Apache, the issues, the upgrades, the nightmare in setting it all up…
If I were to do that job again I would not hesitate to use NPM 100% and stop wasting my time with that Apache Proxy mess.