fix: update plane-web for nginx-based stable image

makeplane/plane-frontend:stable now uses nginx (not Next.js/node).
Remove `command: node web/server.js` override and update Traefik
port from 3000 to 80.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

roles/services/templates/docker-compose.yml.j2

@@ -152,20 +152,17 @@ services:
     image: {{ plane_frontend_image }}
     container_name: plane-web
     restart: unless-stopped
-    command: node web/server.js
     depends_on:
       - plane-api
     networks:
       - backend
       - plane-internal
-    environment:
-      - NEXT_PUBLIC_API_BASE_URL=https://{{ domain_plane }}
     labels:
       - "traefik.enable=true"
       - "traefik.http.routers.plane.rule=Host(`{{ domain_plane }}`)"
       - "traefik.http.routers.plane.entrypoints=websecure"
       - "traefik.http.routers.plane.tls.certresolver=letsencrypt"
-      - "traefik.http.services.plane.loadbalancer.server.port=3000"
+      - "traefik.http.services.plane.loadbalancer.server.port=80"
 
   plane-api:
     image: {{ plane_backend_image }}