Push Dockerhub README.md file on release
Add stage 'readme' and job 'readme_docker_release_tag' to push the file 'docker/README.md' to the team's duniter-v2s repo.
The job uses chko/docker-pushrm and is adapted from the related Gitlab CI/CD example.
Add stage 'readme' and job 'readme_docker_release_tag' to push the file 'docker/README.md' to the team's duniter-v2s repo.
The job uses chko/docker-pushrm and is adapted from the related Gitlab CI/CD example.