easy install

[lorenz369]

goal

create an install magic to simplify adding packages to the docker image via different installers

installers (in this order)

apt, pip, conda, npm

example

instead of

apt-get update && apt-get install -y somepackage && rm-rf  #to clean up apt-get update

we want

%install apt somepackage

[lorenz369]

Add apt as second option to apt-get.

optional: support --no-install-recommends see here

[lorenz369]

Double-check conda, npm, pip commands

[lorenz369]

Implemented here