Optional overloading key configuration files using {{ .Files.Get }}

[mwallschlaeger]

Helm provides the capability to allow reading e.g. configmap content from files. This could be used to allow users to bring their own custom configuration files into this deployment.

I can imagine this can be helpful for several files like: settings.py, geoserver configuration, tasks.py, entrypoint.sh, nginx-configuration and so on.

Implementing this into the helm chart is a doable task.