This may help: https://caddy.community/t/using-caddy-as-a-reverse-proxy-in-a-home-network/9427
I am just starting the same journey and have also experienced the lack of good guides for noobs. Most guides are on integrating more complex setups.
This is really cool!
I saw that Synology Photos is getting some sort of object recognition in an upcoming update. But I love the idea of running your app on a container on my Mac (with lots of cores to run the ML code) while keeping the photos homed on the NAS. Definitely going to play with it :)
Likely will cost the same, or very close. The quad core CPU would be a nice upgrade for me. I’ve ended up running a lot more Docker services on my 220+ than I had expected when I started.