Merge pull request #1 from wunderio/feature/bastion-mode

SLT-1046: Denies local login, denies tunnel creation from bastion host

Include static keys if present

Include static keys if present

Updating base image

Allow tunelling

Better handling of docker signals

Using external key server; AuthorizedKeysCommand python script replac…

…ed with bash/curl.

Move ssh fingerprint keys to a dedicated folder

Pipe SSHD log to stdio; create home folder for www-admin