scripts: images containers manifest: Build json from dirs

[johnandersen777]

Related: #1273

$ (echo '```json' && JSON_INDENT="    " python -u scripts/images_containers_manifest.py  && echo '```' ) | gh pr comment https://github.com/intel/dffml/pull/1450 --body-file -
$ (echo '```json' && JSON_INDENT="    " env - $(which python) -u scripts/images_containers_manifest.py | python -m json.tool && echo '```' ) | gh pr comment https://github.com/intel/dffml/pull/1450 --body-file -
::notice file=/home/pdxjohnny/Documents/python/dffml/scripts/images_containers_manifest.py,line=1,endLine=1,title=nobase::None of ['BASE', 'BASE_REF'] found in os.environ
https://github.com/intel/dffml/pull/1450#issuecomment-1513665665

[johnandersen777]

{
    "@context": {
        "@vocab": "https://github.com/intel/dffml/raw/c82f7ddd29a00d24217c50370907c281c4b5b54d/schema/github/actions/build/images/containers/0.0.0.schema.json"
    },
    "include": [
        {
            "branch": "fix_ci_cd",
            "build_args": "[]",
            "commit": "c010757175bd8603eb56ee671b0698b5ad8de91a",
            "dockerfile": "Dockerfile",
            "image_name": "dffml",
            "owner": "intel",
            "repository": "dffml"
        },
        {
            "branch": "fix_ci_cd",
            "build_args": "[]",
            "commit": "c010757175bd8603eb56ee671b0698b5ad8de91a",
            "dockerfile": "scripts/gitpod.Dockerfile",
            "image_name": "gitpod",
            "owner": "intel",
            "repository": "dffml"
        },
        {
            "branch": "fix_ci_cd",
            "build_args": "[]",
            "commit": "c010757175bd8603eb56ee671b0698b5ad8de91a",
            "dockerfile": "dffml/skel/operations/Dockerfile",
            "image_name": "dffml-skel-operations",
            "owner": "intel",
            "repository": "dffml"
        }
    ]
}