Document multi-image container scanning
Problem to solve
The purpose of this issue is to update the GitLab Container Scanning documentation to explain how to scan multiple images at the same time, including support for remediations, as well as describing limitations.
See #6946 (comment 295315324) for a proof of concept for a container scan with multiple images
Also see https://gitlab.com/adamcohen/container-scanning-multi-image/pipelines/122506321/security for an example of building multiple images and then scanning them, including specifying multiple
Dockerfile values for remediations.
The following MR should be used as a basis for providing documentation for the proper way to scan a multiple images with multiple
Dockerfiles: Three Docker files with three built images