Merge branch '291-keycloak' into 'main'
Support for integrating Keycloak The following changes were made: - Added ability to override default HTTPS hosts in gateway. Fixes #11 - Removed requirement for `credentialName` in `extraServers`. Passthrough servers do not require this field - Changed `hostname` field to `domain` for clarity. Added backwards compatibility for hostname to avoid breaking changes. See merge request !40