fix: admin Traefik 라우팅 비활성화 (/admin/* → web 앱에서 처리)

admin 앱에 실제 페이지가 없어 404 발생하던 문제 해결.
web 앱의 /admin/* 라우트가 정상 처리되도록 변경.

docker-compose.prod.yml

@@ -45,7 +45,6 @@ services:
       - traefik_letsencrypt:/letsencrypt
     depends_on:
       - web
-      - admin
 
   migrate:
     build:
@@ -105,13 +104,7 @@ services:
       REDIS_URL: redis://:${REDIS_PASSWORD}@redis:6379
       NODE_ENV: production
     labels:
-      - "traefik.enable=true"
-      - "traefik.http.routers.admin.rule=Host(`startover.co.kr`) && PathPrefix(`/admin`)"
-      - "traefik.http.routers.admin.entrypoints=websecure"
-      - "traefik.http.routers.admin.tls.certresolver=letsencrypt"
-      - "traefik.http.routers.admin.middlewares=admin-strip"
-      - "traefik.http.middlewares.admin-strip.stripprefix.prefixes=/admin"
-      - "traefik.http.services.admin.loadbalancer.server.port=3000"
+      - "traefik.enable=false"
     depends_on:
       postgres:
         condition: service_healthy