Reverse proxy prefix

[josdotso]

Hi. Looking to run this container behind a reverse proxy (e.g. example.com/archiva), and I gather Archiva needs to be started with knowledge that it's being prefixed. I haven't tracked down that specific mechanism just yet, but I'm certain it would be awesome if it were exposed as an environment variable for this container.

Please let me know your thoughts and thanks for the great container!

-Joshua

[josdotso]

Right, so I think it's this line where the context path should go (e.g. /archiva instead of the default /, in my case).
https://github.com/apache/archiva/blob/master/archiva-jetty/src/main/contexts/archiva.xml#L25

Also, here are the docs for the context bit:
http://archiva.apache.org/docs/2.2.0/adminguide/standalone.html