Using Google ;-)

https://www.naturalborncoder.com/linux/2021/02/19/making-a-docker-container-use-a-vpn/

Yup, electric installation in Western Europe is so bad that nobody would attempt this. There is a good chance (a few %) that the plug is not linked to a breaker, or that the breaker has seen multiple world wars. That is if you have circuit breakers altogether.