CI/CD: cache devbox install to speed up deployment

[prestoncabe]

Right now, every deploy of the app/api requires an install of the devbox setup, which can take several minutes to complete. In order to speed up deployment and make it more practical run tests during deployment, we'd like to cache the devbox setup somehow.

The place to start is by troubleshooting the built-in enable-cache option on the devbox Github Action:

      # Setup devbox which includes all our dependencies: Maven, JDK 21, Quarkus, etc.
      - name: 'Install devbox'
        uses: 'jetify-com/devbox-install-action@v0.12.0'
        with:
          enable-cache: true

Does this always not work?
Would it work with some sort of configuration change?

One alternative option would be to use Docker to cache (the image would only be rebuilt with a change to the devbox-related files)