ubuntu-core

Ubuntu 16.04 LTS server with ssh.
Connect to it from master:
docker exec -it container-name zsh
Features:
- production ready (already in use for live containers)
- low CPU consumption (uses 0.1% of one CPU core)
- uses only 16 MB of RAM (with active SSH / ZSH session)
- ssh (with oh my zsh custom theme)
- custom user (your own user with sudo rigths)
- cron (you can use crontab -e)
- git (git client installed)
- sendmail (you can send emails from this container)
- home volume (on master "/var/docker-data/container/")
- vim (with utf-8 setting)
- more packages (curl, wget, nano, unzip)