Clarify docs that Managed Apps CI/CD is default to production
Problem to solve
production
environment name is hardcoded to the file /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/ci/templates/Managed-Cluster-Applications.gitlab-ci.yml
that we are recommending to include, it can be confusing for those who want to deploy to environments with other names or if the cluster's scope if not production
.
Proposal
We should at least document this and inform how to customize it in this section:
https://docs.gitlab.com/ee/user/clusters/applications.html#usage