Always pass `gck.env` into container
This makes us to pass and evaluate exact content
of gck.env into container allowing to pass any
environment variables.
Anything that is put in gck.env will be exported as env variable
as well in a container, allowing to easily define any env variable.
The same gck.env is include by Makefile.
Edited by Kamil Trzciński (Back 2025-01-01)