Add docker-compose.yml to the release assets

### Preconditions

Without Commerce Cloud license, Magento Community Edition users are not able to easily configure their local instances with Docker. The `docker-compose.yml` file can be generated using `ece-docker` which is not available for the open-source community.

Proposed solution
1. Images are built and published to https://hub.docker.com/u/magento
2. `docker-compose.yml` is added as an asset in https://github.com/magento/magento-cloud-docker/releases

### Expected result

1. `docker-compose.yml` is added as an asset in https://github.com/magento/magento-cloud-docker/releases

### Actual result

1. No `docker-compose.yml` for the open-source community.

Start by reviewing the existing release process in the magento-cloud-docker repository and how ece-docker generates docker-compose.yml. Check the Magento Docker Hub images and the magento-cloud-docker releases referenced in the issue. Done means the required images are published and docker-compose.yml is attached as a release asset for the open-source community.

Written by the indexing model from the issue text.