docker compose config will normalise a port mapping like:

    ports:
      - 3306:3306

to this:

    ports:
    - mode: ingress
      target: 3306
      published: "3306"
      protocol: tcp

Trying to pipe this into buildx bake 0.8.0 hits an error:

error: failed to parse -: parsing yaml: services.mysql.ports.0.published must be a integer, parsing hcl: -.hcl:17,11-12: Invalid character; Single quotes are not valid. Use double quotes (") to enclose strings., and 13 other diagnostic(s)

The compose-spec allows either int or string here, because it's supposed to be able to support a range like "3306-3310" - I guess compose is choosing to always output string