is Dockerfile broken?

[nizamsp]

Thanks for the great tutorial on logstash. I am trying to build your dockerfile and it fails like this.
Can you please let us know whether you are able to build this now.

The following packages have unmet dependencies:
openssh-server : Depends: upstart-job
E: Unable to correct problems, you have held broken packages.
The command '/bin/sh -c DEBIAN_FRONTEND=noninteractive apt-get install -y openssh-server && mkdir /var/run/sshd && chmod 700 /var/run/sshd && echo 'r
oot:root' |chpasswd' returned a non-zero code: 100