These files are useful for those who create Docker images based on this
baseimage, and need to make a final cleanup and/or use some
configurations that are inside buildconfig file.
There no point in changing the build process of an image based on this
baseimage, since the services would be already installed (or note) on
the original image. The point for optional services installation is
just useful when build your own image based on this baseimage source
repository, change the `image/buildconfig` file.
You can user `ENV` directive in Dockerfile to disable the installation
for some services or change `image/buildconfig`.
The flags are :
DISABLE_SSHD
DISABLE_CRON
DISABLE_SYSLOG
Enderson Maia