fix: Remap ports to avoid conflicts — 8087/8088/8089

Frontend nginx: 8087, API: 8088, NATS: 8089. Removed NATS
monitoring and WebSocket host ports (not needed externally).

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

docker/docker-compose.yml

@@ -29,9 +29,7 @@ services:
       - nats_data:/data
       - ./nats.conf:/etc/nats/nats.conf:ro
     ports:
-      - "4222:4222"   # Client connections
-      - "8222:8222"   # Monitoring
-      - "9222:9222"   # WebSocket (frontend real-time)
+      - "8089:4222"   # Client connections
     healthcheck:
       test: ["CMD", "nats-server", "--signal", "ldm"]
       interval: 10s
@@ -67,7 +65,7 @@ services:
       nats:
         condition: service_healthy
     ports:
-      - "3000:3000"
+      - "8088:3000"
 
   nginx:
     image: nginx:alpine