It’s the other way around. 0.1 kWh means 0.1 kW times 1 h. So if your device draws 0.1 kW (100 W) of power for an hour, it consumes 0.1 kWh of energy. If your device factory draws 360 000 W for a second, it consumes the same amount of 0.1 kWh of energy.

There are different ways to run container. I run them via podman-systemd services. For me, the main benefits of running a container over an executable on the host system are the following:

• not everything I want to self-host is packaged for my distro, but they all have container images available
• operating system updates are independent from application updates, application updates are independent from each other. One broken dependency won’t kill my entire stack
• all containers are running without root privileges and with restricted access to the host system. One vulnerable application won’t give access to my entire system
• I can have all my config in one directory (~/.config/containers/systemd/), instead of having them across multiple /etc/* directories
• volume bind mounts make it easy to declaratively mount any folder anywhere, so I can keep my directory structure how I like it
• cockpit offers a great UI to visualize my hosted applications

I’m likely to rebuild the backend in Go

Why bother with another language? Rust offers multiple great backend options. Using the same language for both ends might allow reusing some parts.