-[Learn how to enable or disable GitLab CI](enable_or_disable_ci.md)-[Learn how `.gitlab-ci.yml` works](yaml/README.md)-[Configure a Runner, the application that runs your builds](runners/README.md)-[Use Docker images with GitLab Runner](docker/using_docker_images.md)-[Use CI to build Docker images](docker/using_docker_build.md)-[Use variables in your `.gitlab-ci.yml`](variables/README.md)-[Use SSH keys in your build environment](ssh_keys/README.md)-[Trigger builds through the API](triggers/README.md)-[Build artifacts](build_artifacts/README.md)-[User permissions](permissions/README.md)-[API](api/README.md)