system docker-image needs file-system

[Jimmy Thrasibule]

Hi,

I'm trying to use Guix in order to create a Docker image. However, I'm
forced to set both ``bootloader`` and ``file-systems`` initializers:

    system.scm:29:0: error: missing field initializers (bootloader
file-systems)

For a Docker image this is quite unexpected. I'm wondering whether there is
a way to bypass this limitation?

Regards,
Jimmy