The `install_packages` command looks like a big win compared to the rather spammy form most Dockerfiles use now to install packages, e.g: $ install_package

The `install_packages` command looks like a big win compared to the rather spammy form most Dockerfiles use now to install packages, e.g: $ install_packages mime-support vs: $ apt-get update && apt-get install -y --no-install-recommends mime-support && \ apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* That's a great win in itself, this is excellent.