Make map_server Docker image lightweight
Make map_server Docker image lightweight

Use gcr.io/distroless/base as the base image.

AlCutter/trillian,daviddrysdale/trillian,RJPercival/trillian,gdbelvin/trillian,Martin2112/trillian,RJPercival/trillian,gdbelvin/trillian,google/trillian,google/trillian,gdbelvin/trillian,daviddrysdale/trillian,Martin2112/trillian,AlCutter/trillian,daviddrysdale/trillian,Martin2112/trillian