Add deployment environment names
See https://docs.gitlab.com/ee/ci/environments/
This enables GitLab to
- display some nice extra links with every deploy that we can click on to check out the new deployment after it's done
- allow us to trigger a deployment of an older version (rollback) if a new one is garbage
- later hopefully: together with reading metrics from Prometheus allow auto-rollback
For this to work, @jcalderone please set up two environments as per the GitLab docs here:
In the UI:
Go to the project’s Operations > Environments page. Select New environment. Enter a name and external URL. Select Save.