A free CI (using Docker-Compose) for your Gitlab repositories?

GitLab offers free CI/CD with 2000 build minutes per month for private repositories. To use docker-compose in GitLab CI, create a `.gitlab-ci.yml` file that uses the docker image, docker:dind service, installs docker-compose via pip, and runs your tests. Add the `-T` flag to `docker-compose exec` commands to avoid TTY-related issues during execution.