So that "make gofmt" and "make golint" go green again

And add an active variable, similiar to docker

Also add an integration test for the env variable

* Refactor: add the docker vars after the shell vars

* Move shell handling functions to separate package

* Rename env source file to docker-env like command

* Add podman-env for connecting with podman-remote

* Remove leading Shell prefix from the shell package

* Add some documentation describing podman service

* Address some podman-env issues pointed out by lint

* Add docker container run time for kic