fido2-server
A FIDO 2.0 / W3C WebAuthn server
This is not the project you are looking for. :)
It is incomplete, deprecated, and will not be updated in the future. But wait, there's more...
This started off as a proof of concept for a FIDO2 server, but when I realized that there were going to be a million different configurations (LDAP, SQL, Mongo backends; different loggers like syslog or banyon; policy engines; risk engines; etc.) I switched to simple-component-manager to enable mixing and matching pieces.
The project you probably want is fido2-server-demo which pulls together a sample set of components for a FIDO2 server. Also, see webauthn.org for a live example.