Add OAuth2-Proxy option to Keycloak LXC

[liveware-problems]

Would it be possible to add the oauth2-proxy binary from https://github.com/oauth2-proxy/oauth2-proxy/releases to the current Keycloak LXC (possibly as an option, similar to having Portainer as an option for Docker VMs / LXCs) and configure it as a service using a config file?

OAuth2-Proxy can add a web proxy auth step into Keycloak (which is sadly missing from Keycloak) similar to Authelia and Authentik. See https://joeeey.com/blog/selfhosting-sso-with-nginx-oauth2-proxy-part-2/ for details of how it can be used and configured alongside Keycloak and Nginx Proxy Manager - both of which I have running in LXCs thanks to your great scripts!

Happy to help test scripts if you think this would be useful.