Firewall rule updates cause Docker to restart on gitlab runners
From jnewsome/sponsor-61-sims#6 (closed)
When this happens, processes inside the container receive SIGKILL as Docker is restarting, which can cause gitlab jobs to fail with code 137 (128 + SIGKILL=9), as happened here: https://gitlab.torproject.org/jnewsome/sponsor-61-sims/-/jobs/63872#L5781
Related Docker bug: https://github.com/moby/moby/issues/12294