I've been investigating more into how ostree works and how it relates to
running `ostree container commit` for each layer. I've decided to move
our pre-installed bins and public keys into their own stages and then
bind mount them into a `RUN` instruction so that we can just use `cp` to
get the files into the image and then call `ostree container commit`.
Now all of our layers in the image (after the base image) will be in the
ostree commit tree.
the `os_version` is defaulting to the `image_tag` inside containers and
causing our template to use latest tag
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Co-authored-by: Gerald Pinder <gmpinder@gmail.com>
Since the command `ostree container commit` checks for the presence of
mounted directories, we will be running it at the end of each module
run. We have also updated the final commit to remove from /tmp/ and
/var/ again in case a user creates extra files through custom
instructions.
Closes#101#95
