Install GitLab Runner using Docker Machine and Digital Ocean for on-demand instance creation.
Install GitLab Runner using Docker Machine and Digital Ocean for on-demand instance creation. See https://www.digitalocean.com/community/tutorials/how-to-autoscale-gitlab-continuous-deployment-with-gitlab-runner-on-digitalocean.
This is intended to be installed on the same host as the GitLab instance, spinning up hosts as needed and quickly tearing them down. If your CI activity is frequent, the `gitlab_runner_machine_idle_time` variable should be increased so hosts can be reused.
