Debian Linux docker image with SSH support.

• Allows ONLY key-based authentication
• Uses hardened SSHD config from https://cipherli.st
• SSHD logs to stderr, so errors are visible in docker log

• Put your public key into the AUTHORIZED_KEYS environment variable

• This uses hardened settings, so DSA keys (and maybe others) are not supported. If you can't login, check the log.
• Not up-to-date? Just let me know, I'll trigger a build