LDAP authentication can be tested with the [`test-openldap`](https://github.com/rroemhild/docker-test-openldap) docker image from [rroemhild](https://github.com/rroemhild).
Simply run
```sh
docker run --rm -p 10389:10389 -p 10636:10636 rroemhild/test-openldap
```
and add the following to the `.env` file before starting the backend.