Configure flexible deployment with environment variables

- Change Flask port from 8080 to 5000 for consistency
- Add environment-based network mode configuration (bridge/host)
- Support both Windows Docker Desktop and Linux LXC deployments
- Remove obsolete docker-compose version and conflicting network settings
- Add .env.example with platform-specific configuration guidance

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

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

docker-compose.yml

@@ -1,25 +1,16 @@
-version: '3.8'
-
 services:
   wol-web:
     build: .
     container_name: wol-manager
     restart: unless-stopped
     ports:
-      - "8088:8080"
+      - "${WOL_EXTERNAL_PORT:-5000}:5000"
     volumes:
       - ./data:/data
-    networks:
-      - wol-network
     environment:
       - PYTHONUNBUFFERED=1
-    # Necesare pentru Wake-on-LAN
-    network_mode: host
+    network_mode: "${WOL_NETWORK_MODE:-bridge}"
     privileged: true
     cap_add:
       - NET_ADMIN
-      - NET_RAW
-
-networks:
-  wol-network:
-    driver: bridge
+      - NET_RAW