Create `hosts.yml` file with float create-env also for non-vagrant setup
float create-env creates a
hosts.yml only when
--vagrant was used.
It would be nice to have an easy way to bootstrap a "real" host so ansible can reach it.
Feel free to reject this if you feel it's out of scope.
In any case the requirement of the
hosts.yml file should be documented in the quick start guide.
See #27 (closed) for more context.