Protobuf 3 Optional using Docker Image

[Awbmilne]

I havent been able to find a way to pass the --experimental_allow_proto3_optional flag to the docker image. I would like to use this image for CI, but installing the app with Go is just more difficult and feels unnecessary.

Is there a way to accomplish this that i'm missing? Or is this not possible?

[panter-dsd]

#464 there is an outdated version of protoc

[davidjlynn]

@Awbmilne With the new version v1.5.1 there is no need to pass the experimental flag, optional is supported by default.
@pseudomuto This can be closed as it is already possible.