Update launch docs to reflect Docker/GKE
Update launch docs to reflect Docker/GKE

Bug: skia:
Change-Id: Ib5d62dfb1f999e07e5a848682f36130766c68f25
Reviewed-on: https://skia-review.googlesource.com/156223
Reviewed-by: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot