Rebuilt on CentOS 7.2.

Added docker push helper.

Fixed line break.

Add image's virtual size.

Minor edits.

Identify OpenSSH/OpenSSL versions.

Resync README. Improve DockerHub formatting.

Added clean script.

Build and tag everything.

Simplify host key generation.

Dropped ignore files.

Moved under versions/ subdirectory.

Drop run script.

Docker automated builds ignore .dockerignore.

Allow argument passing to SSHD.