Document how to use custom docker images about footloose

[rothgar]

Is there documentation on how to do this with a non footloose image? eg I would love to do with with amazonlinux but am not sure what the images require to run in footloose.

[dlespiau]

Hi Justin,

There are two things:

• A base image with systemd, sshd and a few details needed to run systemd in a container (eg. container env variable, removing some unneeded unit files, ...). For that I created a new issue (#59). These base image could live in quay.io/footloose/amazonlinux2
• Once we have base image, you can create your own customisation of the base image, say by adding packages you need for what you're doing with the machine. It's just another docker image, deriving from one of the base images (FROM quay.io/footloose/amazonlinux2). That's what this issue is about.

I can look at providing a base image this week, maybe even today. Or you can try if you want to and have time :) (that's #59).

I'll put this issue in the 0.2.0 milestone, that's really an easy addition to the README in the example section, just need to think about a use case, say having docker pre-provisioned in the container machines.