Set up secrets for build-*-image actions

[booxter]

Actions fail as:

Run docker/login-action@v2
  with:
    registry: quay.io
    ecr: auto
    logout: true
Error: Username and password required

I believe secrets need to be set up for the repo,

      - name: Login to Quay.io
        uses: docker/login-action@v2
        with:
          registry: quay.io
          username: ${{ secrets.APP_QUAY_USERNAME }}
          password: ${{ secrets.APP_QUAY_TOKEN }}