Not everyone who uses Docker uses CRON, nor considers them long-term containers; rather short term process containers.
Docker is growing and how we use docker will change so be flexible and realize what you considered useful yesterday may not be required tomorrow. We will have to re-learn best practices and keep learning after that.
Note, the Ubuntu image isn't made by Ubuntu. Maybe Phusion should host their own Ubuntu image just for sakes of sakes.
The Ubuntu base image (or how it's built) can be found https://github.com/tianon/docker-brew-ubuntu
Some excellent examples of how to use them with /sbin/init can be found https://github.com/tianon/dockerfiles/tree/master/sbin-init/...
Not everyone who uses Docker uses CRON, nor considers them long-term containers; rather short term process containers.
Docker is growing and how we use docker will change so be flexible and realize what you considered useful yesterday may not be required tomorrow. We will have to re-learn best practices and keep learning after that.
Note, the Ubuntu image isn't made by Ubuntu. Maybe Phusion should host their own Ubuntu image just for sakes of sakes.