[DO NOT MERGE] example of bootstrap stuff

The main script is `bootstrap` which executes `boostrap.yml` after setting some environment variables.

I spent a few hours trying to figure out why it does not work and it looks preferred way of authentication is essential.
You might want to expand on this, since the default ssh configuration doesn't allow root login (so perhaps, "/etc/ssh/sshd_config must specify 'PermitRootLogin yes'")