Base image for other docker images

The image contains passwd, sudo, cron and krallin/tini and is built on top of clover/busybox.

Enviroment variables

Name	Default value	Description
PUID	50	Desired UID of the process owner *
PGID	primary group id of the UID user (50)	Desired GID of the process owner *
CRON	not set	Will start cron inside the container if set to 1