with:
          registry: gcr.io
          username: _json_key
          password: ${{ secrets.GCP_CREDS }}
      -
        name: Grab the date to do cache busting (assumes same day OK to keep)
        run: |
          echo "DATE=$(date +'%Y-%m-%d')" >> "$GITHUB_OUTPUT"
        id: date
      -
        name: Build containers, and push to GCR only if the 'build and push to gcr.io for staging' label is applied