Simplify "Install with Docker" instructions.
Simplify "Install with Docker" instructions.

* Removed unnecessary Vagrant configuration steps since project includes a Vagrantfile
* Added Virtualbox as a prerequisite
* Changed port number to match fig.yml
rbramwell/runbook,madflojo/cloudroutes-service,rbramwell/runbook,Runbook/runbook,asm-products/cloudroutes-service,asm-products/cloudroutes-service,codecakes/cloudroutes-service,Runbook/runbook,codecakes/cloudroutes-service,dethos/cloudroutes-service,madflojo/cloudroutes-service,madflojo/cloudroutes-service,madflojo/cloudroutes-service,rbramwell/runbook,asm-products/cloudroutes-service,dethos/cloudroutes-service,codecakes/cloudroutes-service,Runbook/runbook,rbramwell/runbook,codecakes/cloudroutes-service,asm-products/cloudroutes-service,dethos/cloudroutes-service,dethos/cloudroutes-service,Runbook/runbook