There are two ways to use OAuth2 Proxy: route your traffic through it directly or use it with the Nginx auth_request directive. I’d recommend routing traffic through Nginx if possible, but I’ll walk through both options and explain my recommendation below.
This is a companion discussion topic for the original entry at https://developer.okta.com/blog/2022/07/14/add-auth-to-any-app-with-oauth2-proxy