BGML Fundamentals Demo Dataproc

Hey Evan,

It would be great if you could add how to connect via the SOCKS proxy to the Dataproc Cluster for the demo.

SSH to master:
gcloud compute ssh master-host-name --project=project-id --zone=master-host-zone -- -D 1080 -N

gcloud compute ssh master-host-name --project=project-id --zone master-host-zone -- -4 -N -L port1:master-host-name:port2

And open in Cloud Shell Webpreview with either port: 8088/9870

Hope it helps!