https://docs.gitlab.com/runner/install/linux-manually.html
sudo usermod -aG docker gitlab-runner
sudo gitlab-runner register \
--non-interactive \
--url "https://gitlab.com/" \
--registration-token "<token>" \
--name "AWS EC2" \
--tag-list "" \
--executor "docker" \
--docker-image "docker:latest" \
--docker-privileged