Containers

We have built up the GitHub Actions pipeline through five sessions: the project basics, software composition analysis, license compliance, and static application security testing. The next layer is container scanning — looking for vulnerabilities inside the Docker image we ship, not just in the source we wrote. In Part 6 of our series, Patrick Steger and I split the work into two GitHub Actions sub-workflows: one builds the image and pushes it to the registry, the other pulls it back and runs Trivy on it.

We have already wired SAST, secret detection, and software composition analysis into the GitLab pipeline. Those checks cover the source code and its dependencies — but the artifact we actually ship is a container image. Operating system packages, the base image, and everything copied in along the way can carry vulnerabilities of their own. In Part 6 of our series, Patrick Steger and I add container scanning to the pipeline, build a Docker image from the jar we compiled earlier, and push it through Trivy and Grype.