adds pseudo.cortex.consider-funding.de upstream, adds snippet for easy oauth2-proxy protect, moves oauth2-proxy secrets to .env file

docker_compose_applications/oauth2-proxy/compose.yaml

@@ -5,6 +5,7 @@ services:
     restart: unless-stopped
     command:
       - --config=/etc/oauth2-proxy/oauth2-proxy.cfg
+    env_file: .env
     volumes:
       - ./oauth2-proxy.cfg:/etc/oauth2-proxy/oauth2-proxy.cfg:ro
     networks: