Rollout Geo to staging.gitlab.com
### Problem to Solve
We want to have a pre-production environment to verify a Geo installation before deployment to Production. The most sensible place to run a pre-prod installation is on staging.gitlab.com.
In order to do this, we need to work with the Infrastructure team to develop the rollout plan.
Having Geo enabled on staging will give us a test environment that has substantially more data than the instances we currently test on. The intention is to have a functioning Geo primary and secondary even if this is not completely representative of what will be in place on Production.
### Links
- https://gitlab.com/gitlab-com/runbooks/blob/master/howto/staging-environment.md
- https://ops.gitlab.net/gitlab-cookbooks/chef-repo/tree/master
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