While most have examples in their readme's on Docker hub and Github, not all of them do, so I sometimes have to hunt down an example buried in their git repo somewhere. So a searchable page for popular self-hosted app docker compose files would be welcome.
I don't think I've seen such a page anywhere else.
The easiest is probably a motion/presence sensor. When there is no movement, turn off the lights. When there is movement, turn the lights on, if it's dark.
KDE is officially a community dedicated to developing FOSS software. It's legally represented by the KDE e.V. and the KDE Free Qt Foundation. The latter is to ensure that the dual-licensed Qt software used by KDE stays open source.
KDE Plasma is the desktop environment made by KDE. It's sometimes called just KDE because, duh, it shorter.
The apps included in Plasma are also made by the KDE (also see KDE Gear).
There's the KDE Frameworks, built on top of Qt.
Plasma mobile is a distribution for mobile devices.
KDE Neon is a "distribution" showcasing the lastest KDE software.
ELement from google play always use the google push notiofication system, which is always running. But element from say f-droid, does not have access to that, so it needs another push daemon to work, like ntfy.
It depends on how the network is setup, I suppose. I don't know how AWS does things, but I would imagine that the Windows Desktop is set to be on the same network/subnet as the compute node you ssh into. Else the node would be accessible by anyone on the internet for brute forcing.
I run a script each week that updates docker images and restarts containers.
And also every week I run a system update command and reboot the server afterwards.
You shouldn't run a server, if you don't have to time to maintain it.
You asked for a graphical date and time settings app to use instead of gnome-system-tools. You didn't mention that you needed the other functionality from gnome-system-tools whatever that may be..
You might already have thought of this, but if this is open to anyone on the internet, expect lots of spam links to be posted there.