fix: add Traefik labels and coolify network to frontend

docker-compose.yml

@@ -15,6 +15,8 @@ services:
       timeout: 5s
       retries: 12
     restart: unless-stopped
+    networks:
+      - internal
 
   # ── Backend Express ─────────────────────────────────────────
   backend:
@@ -35,6 +37,8 @@ services:
       db:
         condition: service_healthy
     restart: unless-stopped
+    networks:
+      - internal
 
   # ── Frontend nginx ──────────────────────────────────────────
   frontend:
@@ -47,7 +51,7 @@ services:
     expose:
       - "80"
     networks:
-      - default
+      - internal
       - coolify
     labels:
       - "traefik.enable=true"
@@ -63,6 +67,8 @@ services:
       - "traefik.http.middlewares.notesfrais-https-redirect.redirectscheme.permanent=true"
 
 networks:
+  internal:
+    driver: bridge
   coolify:
     external: true