[infrastructure] make ports configurable in docker images

[twatzl]

ports should be configurable the services should have a configurable address for the eventdb.

[kadhonn]

i am not sure why you would want to configure the ports inside a container since they are isolated from each other? and for a localhost setup you can map those internal ports to whatever port on the outside however you want?

also the url is of course configurable for every service via the boudicca.eventdb.url property