Cannot logout if WALDUR_CORE['HOMEPORT_URL'] is not defined

[rolnas]

If WALDUR_CORE['HOMEPORT_URL'] is not defined in config/waldur-mastermind/override.conf.py, then redirect from logout is made to example.com site. Should HOMEPORT_URL be defined from WALDUR_DOMAIN in .env ? That is for keycloak provider at least.