title: What is the purpose of oauth2 proxy sidecar?
body: <p>Could you please provide explanation for what reason <a href="https://github.com/oauth2-proxy/oauth2-proxy" rel="nofollow noreferrer">oauth2-proxy</a> as sidecar can be used?
  For example an architecture where every pod in k8s has this sidecar, which proxies to Keycloack.</p>