gitlab ci with systemd

It works 😄

But it sometimes fail like this: https://gitlab.com/etam/ipfs-pinning-server/-/jobs/5192605509 . It looks like some issues between docker and the system it's running on (see https://serverfault.com/questions/1137215/how-can-i-write-a-dockerfile-based-on-debian-slim-in-which-apt-get-update-does/1137357#1137357). I tried adding --security-opt seccomp=unconfined, but it did nothing.