Dockerfile

#
# Proof of Concept
#
# Compose a docker image of an upstream images so that binaries packages in one
# image can be incorporated into another.
#
# TODO This copies, would be nice if there was a way to attach an image to a
#      container like `docker run --volumes-from` does for containers.

# These FROMs used as a way to distribute files via an image
FROM busybox:1.31.1 AS bb
FROM ubuntu:20.04 AS ub20

# This is the base for the next steps
FROM alpine:3

# Copy the files form the busybox image to demonstrate it works
COPY --from=bb   /bin/busybox /opt/magick/busybox
COPY --from=ub20 /            /opt/magick/ubuntu

# By default list the directory we are demonstrating
CMD ls -lR /opt/magick