Oauth2-proxy sidecar pattern instead of Middleware CRD #27

Currently auth middleware enables Traefik to protect services without authentication accessed from Ingress.
oauth2-proxy is supposed to also works as a co-container - it will proxy all requests to some other container in the same pod, whilist other being binded to localhost, so that other pods in the cluster cannot bypass the authentication.

Investigate, how would it be possible to elegantly create such functionality.