| `NPM_BUILD_OPTIONS` | Options passed to your build script | ` ` |
| `NPM_BUILD_OUTPUT_FOLDER` | Path to the output produced by the `npm` build script used (path relative from the `PROJECT_ROOT`) | `build` |
| `PAGES_FOLDER` | Path where to copy the output to be exposed for deployment on [pages](https://r2devops.io/_/gitlab/r2devops/hub/pages)(path relative from the root of the repository) | `./website_build` |
| `IMAGE_TAG` | The default tag for the docker image | `18-buster` |
| `IMAGE_TAG` | The default tag for the docker image | `20-buster` |