Hey folks, I'm working on some infra upgrades - I'm trying to update our usage of docker in pulumi and I'm running into an issue. In the past we've built a base image for our monorepo outside of pulumi (in gh actions) then each service has its dockerfile (which depends on that base) built by pulumi. After upgrading, it seems the new pulumi docker stuff can't see the base image anymore. Is this some buildkit thing? Is there a way to import the base image into the buildkit context or whatever?