* More Parametrization, example.
 * All synced_folders are included.
 * Vagrantfile of baseimage and passenger are nearly identical now.  (I got to that when wanting to try passenger.  But already had a vagrant box started from baseimage, there was no need to dup the effort, just reuse the existing single box for all.  Then in end of day, may not need multiple Vagrantfiles.  Passenger is a simple structure/process for managing dockers, but only needing to use baseimage once and have one VM up)