Cronjob should have the same env variables and volumes to proceed correctly

`nindent` function insert fist newline before actual content and allow you use it on any level of yaml without breaking visual structure.

In case of S3 we can use IAM role to access bucket, in that case we do not need to define anything in secrets. At the same time due to missed parent level field chart will fail with an error.

We don't have unlimited storage, and we would like to run built-in garbage collector to keep storage usage low.

…into garbage-collector

Includes moving additions to demployment.yaml to _helpers.tpl ref twuni/docker-registry.helm@v1.13.0...v2.1.0

* 'main' of https:/twuni/docker-registry.helm: (22 commits)
  Updated README with initContainers value
  Add initContainer support
  🏁 v2.1.0 Release
  Added support for autoscaling using hpa
  🏁 v2.0.1 Release
  🌐 make protocol selection work with istio
  fix(templates): Add checksum on secret.yaml file
  🏁 v2.0.0 Release
  Fix twuni#19 (new kubernetes API version)
  🏁 v1.16.0 Release
  Conditionally create service account and add to deployment
  🏁 v1.15.0 Release
  Support deployment to a namespace
  Updated typo to enable(d)
  🏁 v1.14.0 Release
  Enable metrics via Prometheus Operator
  Support additional env variables
  🏁 v1.13.2 Release
  Add support for S3 bucket to prefix all data
  🏁 v1.13.1 Release
  ...

The default value is documented in the README as `nil`, and where referenced, a falsey value is adequate.

Co-authored-by: ddelange <[email protected]>