expose a range of ports to the VILLASnode gateway (closes #2)

Dockerfile.node

 FROM villas/node:latest
 
 COPY etc/node/*.conf /etc/villas/node/
+
+EXPOSE 12000-12100/udp
+EXPOSE 12000-12100/tcp

docker-compose.yml

@@ -53,6 +53,9 @@ services:
     command: node /etc/villas/node/websocket-demo.conf
     volumes:
       - ./etc/node:/etc/villas/node
+    ports:
+      - "12000-12100:12000-12100/udp"
+      - "12000-12100:12000-12100/tcp"
 
   # Web Interface for MongoDB
   mongo-express: