Add the ability to execute builds by running a Docker image and generate provenance for the build.

This will add a new container workflow which will allow projects to build artifacts using a docker image and generate provenance for SLSA Level 3.

This milestone will add a new reusable workflow to build and publish Node.js npm packages with that means the provenance requirements
for SLSA Level 3 by simply adding a new job to their existing GitHub Actions workflow.

This will serve as the "Trusted Builder" for npm RFC-0049.

A new reusable workflow will be developed (likely in another repository) to build Docker images from a Dockerfile.

This will add a new Dockerfile builder workflow which will allow OSS projects to generate provenance for their Docker images that satisfies the provenance requirements for SLSA Level 3.

This workflow will use the BYOB framework.