Add org.opencontainers.image.* labels to Dockerfiles

[marccarre]

Why? What?

• This should ultimately help for image-to-code back references.
• org.label-schema.* labels are now deprecated, in favour of org.opencontainers.image.* labels.
  See also: https://github.com/opencontainers/image-spec/blob/master/annotations.md#back-compatibility-with-label-schema
• MAINTAINER is deprecated, in favour of the maintainer label. Both were missing so the latter was added.

Testing

$ docker inspect quay.io/weaveworks/flux
[
    {
        [...]
        "ContainerConfig": {
            [...]
            "Labels": {
                "maintainer": "Weaveworks <[email protected]>",
                "org.label-schema.build-date": "2018-05-11T13:56:53Z",
                "org.label-schema.description": "The Flux daemon, for synchronising your cluster with a git repo, and deploying new images",
                "org.label-schema.name": "flux",
                "org.label-schema.schema-version": "1.0",
                "org.label-schema.url": "https://github.com/weaveworks/flux",
                "org.label-schema.vcs-ref": "b719f6404ccc5247278d73849df1a89cf5e78b8c",
                "org.label-schema.vcs-url": "[email protected]:weaveworks/flux",
                "org.label-schema.vendor": "Weaveworks",
                "org.opencontainers.image.created": "2018-05-11T13:56:53Z",
                "org.opencontainers.image.description": "The Flux daemon, for synchronising your cluster with a git repo, and deploying new images",
                "org.opencontainers.image.revision": "b719f6404ccc5247278d73849df1a89cf5e78b8c",
                "org.opencontainers.image.source": "[email protected]:weaveworks/flux",
                "org.opencontainers.image.title": "flux",
                "org.opencontainers.image.url": "https://github.com/weaveworks/flux",
                "org.opencontainers.image.vendor": "Weaveworks"
            }
[...]

$ docker inspect quay.io/weaveworks/helm-operator
[
    {
        [...]
        "ContainerConfig": {
            [...]
            "Labels": {
                "maintainer": "Weaveworks <[email protected]>",
                "org.label-schema.build-date": "2018-05-11T13:56:53Z",
                "org.label-schema.description": "The Flux Helm operator, for releasing Helm charts according to git",
                "org.label-schema.name": "flux-helm-operator",
                "org.label-schema.schema-version": "1.0",
                "org.label-schema.url": "https://github.com/weaveworks/flux",
                "org.label-schema.vcs-ref": "b719f6404ccc5247278d73849df1a89cf5e78b8c",
                "org.label-schema.vcs-url": "[email protected]:weaveworks/flux",
                "org.label-schema.vendor": "Weaveworks",
                "org.opencontainers.image.created": "2018-05-11T13:56:53Z",
                "org.opencontainers.image.description": "The Flux Helm operator, for releasing Helm charts according to git",
                "org.opencontainers.image.revision": "b719f6404ccc5247278d73849df1a89cf5e78b8c",
                "org.opencontainers.image.source": "[email protected]:weaveworks/flux",
                "org.opencontainers.image.title": "flux-helm-operator",
                "org.opencontainers.image.url": "https://github.com/weaveworks/flux",
                "org.opencontainers.image.vendor": "Weaveworks"
            }
[...]

[squaremo]

Nice and neat, thanks Marc 🍱