Allow additional bind mounts to be specified to toolbox-create

[pwithnall]

It would be useful to be able to specify additional bind mounts when creating a container. In my particular use case, I would like to expose /opt on my host to my container, since I have source code on the host and would like to build it inside the container.

Something like the following would be good:

toolbox create --bind /opt:/opt --bind /another-path:/somewhere-else

These would just be passed straight through as --volume arguments to podman create.

(Sorry for not putting together a PR myself, but editing a 2100 line bash script really doesn’t excite me.)

[cgwalters]

This is exactly #100 which started a reimplementation - we're going to merge things.

[pwithnall]

Let’s close this as a duplicate of #100 then, thanks!