On 10/28/2016 at 13:01 Hartmut Goebel writes:

> Hi,
>
> for a demonstration I need to set up a container running nginx and
> postres and maybe ssh. nginx and ssh should be accessible from outside
> the vm, at least from the host. 

In an effort to reply to your request for a "working, complete example,"
I attach the hackage that I use to manage the care and feeding of
LAN-visible GuixSD VM images running on a headless GuixSD server.

For details please see the comments in 'aba'

HTH - George