Correct! I get confused sometimes! :)

RTMP cameras with Motion: https://motion-project.github.io/

I use https://tt-rss.org/ The devs are kinda jerks, but the app works decently if you can self-host. Theres also a couple of phone-apps that work fairly well.

I use Webcalendar - https://www.k5n.us/webcalendar/

Its been a while since I’ve looked at the alternatives, but this has served me well for >7 years

I have Dovecot and Postfix running on Debian on a server in my closet. Works great for my needs

I just use a few shell scripts. Basically some simple bash scripts that do all the work after a fresh install.

Kubernetes/Ansible are great to learn, but are also more complicated for simple setups.