[Feature]: Use `entrypoint` from container image

[bbkz]

Affected Chart

icinga-stack

Please describe your feature request

Currently the statefulset is not using the ENTRYPOINT from the container image, it is overridden here:

helm-charts/charts/icinga-stack/charts/icinga2/templates/statefulset.yaml

Lines 44 to 46 in 6f484b9

	command:
	- icinga2
	- daemon

If one want's to use the environment variable MSMTPRC mentioned in the icinga container image, it will not work.

https://github.com/Icinga/docker-icinga2/blob/a399eac13faca43bda9319f92f95df03c118ddc6/README.md?plain=1#L68-L70

It would be nice to use args instead of command, btw. the initContainer is using the ENTRYPOINT but not the main icinga2 container:

args:
    - icinga2
    - daemon