Run OpenProject with LemonLDAP::NG as authentication provider (SSO).
Update your /etc/hosts file with the following entries:
127.0.0.1 auth.example.local
127.0.0.1 manager.example.local
127.0.0.1 handler.example.local
127.0.0.1 openproject.example.local
docker compose -f docker-compose-lemonldap.yml -f docker-compose-openproject.yml up -dThe default login is dwho and the default password is dwho.
Go in the WebSSO tab.
The default login is admin and the default password is admin.
Go in Administration > Authentication > OpenID providers.
Check the documentation: https://www.openproject.org/docs/installation-and-operations/misc/custom-openid-connect-providers/