sbt/sbt-native-packager — pull request #280 by garycoady (2014-06-23 13:29:54+00:00)
Title: Support Docker volumes.

Docker has a feature where it can import or export "volumes", or subtrees of
the filesystem which can be shared in different ways between Docker containers,
or between a container and the host machine.

This adds the command to the Dockerfile which sets up the knowledge inside
Docker. Also, if a directory is created which does not exist, it will be owned
by root. This would be unfortunate if, for example, the exported directory
was the logs/ directory for Play. So the directories are created beforehand.