Fix Traefik network and Authentik middleware configuration

- Add traefik-network to container networks (CRITICAL FIX)
- Change middleware to authentik-forward-auth@file
- Update traefik.docker.network to traefik-network
- Document network requirements
- Update Authentik configuration instructions

docker-compose.yml

@@ -14,10 +14,11 @@ services:
       - NUXT_PUBLIC_APP_URL=${NUXT_PUBLIC_APP_URL}
     networks:
       - principal
+      - traefik-network
     labels:
       # Traefik labels
       - "traefik.enable=true"
-      - "traefik.docker.network=principal"
+      - "traefik.docker.network=traefik-network"
 
       # HTTP Router
       - "traefik.http.routers.${APP_NAME}.rule=Host(`${APP_DOMAIN}`)"
@@ -27,9 +28,8 @@ services:
       # Service
       - "traefik.http.services.${APP_NAME}.loadbalancer.server.port=3000"
 
-      # Middleware chain: Authentik Proxy Outpost + Headers
-      # IMPORTANTE: Reemplaza 'authentik-outpost@docker' con el nombre de tu proxy outpost
-      - "traefik.http.routers.${APP_NAME}.middlewares=authentik-outpost@docker,${APP_NAME}-headers"
+      # Middleware chain: Authentik Forward Auth + Headers
+      - "traefik.http.routers.${APP_NAME}.middlewares=authentik-forward-auth@file,${APP_NAME}-headers"
 
       # Custom headers middleware
       - "traefik.http.middlewares.${APP_NAME}-headers.headers.customrequestheaders.X-Forwarded-Proto=https"
@@ -37,3 +37,5 @@ services:
 networks:
   principal:
     external: true
+  traefik-network:
+    external: true