Port Mirror and GoFlow Collector

So I've got a port mirror on my switch connected to an ubuntu machine that is running the GoFlow docker container, its unclear to me how I might be able to have the packets coming in on that interface sent to the GoFlow collector. I'd love to be able to use GoFlow to monitor our networks with either a mirror or a tap.

I know the port mirror interface is working, TCPDump was seeing the appropriate packets coming through.

Any thoughts are be appreciated.

Thanks,
Jim