Looks like the docs are out of date for circle 2.0 in regards to what the current docker version is.
https://circleci.com/docs/2.0/building-docker-images/#docker-version
We are using aws ecr login which generates a docker command that includes the --email flag. This flag is only just removed in docker 17.06.0-ce but the circle docs say the default is 17.03.0-ce. Nowhere in our circle config are we specifying the use of 17.06.0-ce, but when I print the docker version in a build, it is indeed, 17.06.0-ce. Am I missing a circle changelog somewhere? The main changelog on the site and the announcements section here don’t state anything about a change in docker version that I could find.