| `shellcheck-disabled` / `BASH_SHELLCHECK_DISABLED` | Set to `true` to disable ShellCheck | _none_ (enabled) |
| `shellcheck-image` / `BASH_SHELLCHECK_IMAGE` | The Docker image used to run [ShellCheck](https://github.com/koalaman/shellcheck) | `registry.hub.docker.com/koalaman/shellcheck-alpine:stable` |