That's the value in the

environment

with the name

IMAGE_DIGEST

.

Yes - we currently inject the docker image ID as the

IMAGE_DIGEST

and it may be that

docker build

will produce different IDs for the same sources on different machines (perhaps even if there are difference

docker

versions?). Could you open an issue to track this in https://github.com/pulumi/pulumi-docker? We are looking to making some changes to how we lock the digest version - and this is a factor we'll want to take into consideration.