It is unclear to me what the best practices are for managing an application with multiple environments, that shares templated files but has different variables per environment. For example, we deploy a develop, staging and production environment. They use the same helm templates, but I have different variables for each environment.

Current File Structure:

helm/
  ├── templates/
  │   ├── _helpers.tpl
  │   ├── deploy.yaml
  │   └── ingress.yaml
  │   └── service.yaml
  │   └── managed-certs.yaml
  │   └── NOTES.txt
  ├── Chart.yaml
  ├── values-production.yaml
  ├── values-staging.yaml
  ├── values-develop.yaml

Right now I have two different value files for each environment, and I pass the following to helm helm install . --values=values-production.yaml

However we are unable to correctly manage versioning with the above.

I cannot find any solid documentation on what best practices are for managing multiple environments for an application. I came across helmfile which seems to tack this, but their documentation is unclear. The ecosystem for managing kubernetes is perplexing, any help appreciated.