| `MAKE_IMAGE` | The Docker image used to run GNU Make<br/>:warning: **set the image required by your project** (see next chapter) | `registry.hub.docker.com/alpinelinux/build-base` |
| `MAKE_PROJECT_DIR` | The root directory of the Makefile project. | `.` |
"description":"Make [options](https://www.gnu.org/software/make/manual/html_node/Options-Summary.html) and [goals](https://www.gnu.org/software/make/manual/html_node/Goals.html) for the build & test job",