Dockerfile to build a debian:jessie baseimage with few extras.
/bin/su is removed from the docker, all the software that goes in top of this image can run without root permissions
apt-get "Install-Recommends" and "Install-Suggests" are setted to FALSE
User and group
A user named "docker-user" and a group named "docker-shared" (gid=7777) are created. umask is setted to "g+w".
The following packages are installed: