The Dockerfile is rewritten with images references on FROM
instructions resolved to trusted digests. The rewritten Dockerfile
is swapped with the original one during context upload.
Docker-DCO-1.1-Signed-off-by: Josh Hawn <josh.hawn@docker.com> (github: jlhawn)
Upstream-commit: 578b1521df85eae8a6205118131751c631323ba5
Component: engine