infra: build quartz docker image to GHCR (#1192)

* Add GitHub action to build & push Docker image to GHCR

* Use double quotes to keep `prettier` happy :)

* Don't run Docker build & push on forks

* -1 char commit lmao

* Add git metadata to Docker image

* Apply Aaron's patch

* chore: run prettier

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Signed-off-by: Aaron Pham <contact@aarnphm.xyz>
Co-authored-by: Aaron Pham <contact@aarnphm.xyz>