| script | yes | Defines a shell script which is executed by runner |
| image | no | Use docker image, covered in [Using Docker Images](../docker/using_docker_images.md#define-image-and-services-from-.gitlab-ci.yml) |
| services | no | Use docker services, covered in [Use Docker - Using Docker Images](../docker/using_docker_images.md#define-image-and-services-from-.gitlab-ci.yml) |
| stage | no | Defines a build stage (default: `test`) |
| type | no | Alias for `stage` |
| only | no | Defines a list of git refs for which build is created |
