nginx config files missing
The nginx config files that were deleted in 8b0965dc are still referenced in [1]. Using [2] still works for me. If the recommended setup has changed, the documentation should be updated.
[1] https://materialdigital.github.io/pmd-server/pages/services/onto-docker/
[2] https://git.material-digital.de/apps/ontodocker/-/blob/a7d9373a3037d3246444b112859ca167da6c9db4/nginx/prod.conf