This image is based on official gitlab/gitlab-runner:alpine.
git pull shamot/docker-gitlab-ci-runner-php
docker run -d --name gitlab-runner --restart always -v /var/run/docker.sock:/var/run/docker.sock -v /srv/gitlab-runner/config:/etc/gitlab-runner shamot/docker-gitlab-ci-runner-php
docker exec -it gitlab-runner gitlab-runner register