title: Keycloak Gatekeeper (forwarding proxy) does nothing
body: <p>I have a docker-compose setup with service 1 (grafana) sending requests to service 2 (prometheus).
  I've put a Keycloak Gatekeeper in front of service 2, asking for authentication.
  That works perfectly fine.</p>
  
  <p>Now my idea was to also place a second Keycloak Gatekeeper in front of service 1, injecting said authentication.</p>
  
  <p>Unfortunately, that doesnt work.
  Observing my traffic via wireshark, it seems my second Keycloak Gatekeeper is not even involved in any communication.</p>
  
  <p>My docker compose file for service 1 and the forwarding proxy looks roughly like this:</p>
  
  <pre><code>keycloak-forwarder:
      image: quay.io/keycloak/keycloak-gatekeeper
      command:
        - --enable-forwarding=true
        - --forwarding-username=&lt;my_username&gt;
        - --forwarding-password=&lt;my_password&gt;
        - --forwarding-domains=${BASE_DOMAIN}/grafana
        - --listen=:3001
        - --client-id=&lt;my_keycloak_client_id&gt;
        - --client-secret=&lt;my_keycloak_client_secret&gt;
        - --discovery-url=${DOMAIN_PROTOCOL}://${KEYCLOAK_DOMAIN}/auth/realms/&lt;my_keycloak_realm&gt;
      networks:
        - webgateway
  
  grafana:
      image: grafana/grafana
      networks:
        - webgateway
      labels:
        traefik.enable: true
        traefik.backend: grafana
        traefik.frontend.rule: Host:${BASE_DOMAIN};PathPrefix:/grafana;PathPrefixStrip:/grafana
        traefik.port: 3000
        traefik.docker.network: webgateway
  </code></pre>