Discourse in a Docker container

Hi.
I installed docker discourse on my ubuntu 12.04 and I want access my container via ssh.
I did everything what is written here: GitHub - discourse/discourse_docker: A Docker image for Discourse · GitHub
and if I bootstrap my app I have this error:

"echo ssh-rsa fsfdsfdsfd ....... root's key >> /root/.ssh/authorized_keys sh: 1: Syntax error: Unterminated quoted string"

What should I do? I tried quote my ssh key in containers/app.yml and still error.

Thank you.