WIP Publish Docker Images From Circle CI and Include ARM64

[orangewolf]

We currently only push images to the Github registry manually. I instead propose that we build them via Circle CI and build both amd64 and arm64. This lays the groundwork for other architectures.

Changes proposed in this pull request:

• Add a new CircleCI job
• Run that job automatically on push to main (this should be discussed)

Guidance for testing, such as acceptance criteria or new user interface behaviors:

• The CircleCi build passes
• The images are available for pulling

@samvera/hyrax-code-reviewers