Add WireGuard VM migration troubleshooting

- Document WireGuard conflict when running on host AND VM
- Add NAT port-forwarding solution for VM migration
- Include iptables-persistent setup

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docker/docker-compose.yml

@@ -237,7 +237,7 @@ services:
       - SAMSUNG_TV_IP=${SAMSUNG_TV_IP:-192.168.178.100}
       - SAMSUNG_TV_MAC=${SAMSUNG_TV_MAC:-}
       - SAMSUNG_TV_NAME=n8n-proxmox
-      - SAMSUNG_TV_PORT=8002
+      - SAMSUNG_TV_PORT=${SAMSUNG_TV_PORT:-8001}
       - SAMSUNG_TV_TOKEN_FILE=/data/tv-token.txt
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:5000/health"]