Environments and deployments blank slate
Following comment: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/4605#note_12464141
We should to 8.9 ship one more MR where we change: No environments and No deployments for with blank slates describing how to use the environments.
We should think what should be present on this pages:
@markpundsack Can you propose text and maybe
.gitlab-ci.yml snippet that we should show there?