Attach frontend to external coolify network so Traefik can route

Coolify's Traefik defaults to the 'coolify' network, but the frontend was only on the per-resource network -> Traefik couldn't reach it (000/empty reply). Join the external coolify network + set traefik.docker.network=coolify.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docker-compose.yml

@@ -29,6 +29,8 @@ services:
       # Persist the SQLite file across container rebuilds.
       - visigine_data:/data
     restart: unless-stopped
+    networks:
+      - default
 
   frontend:
     build:
@@ -41,6 +43,18 @@ services:
       backend:
         condition: service_healthy
     restart: unless-stopped
+    # Join Coolify's proxy network so Traefik (which defaults to the `coolify`
+    # network) can reach this container, and point Traefik at that network
+    # explicitly since the container is attached to several.
+    networks:
+      - default
+      - coolify
+    labels:
+      - "traefik.docker.network=coolify"
+
+networks:
+  coolify:
+    external: true
 
 volumes:
   visigine_data: