Update Dockerfile

Dockerfile

@@ -19,6 +19,6 @@ RUN cp vm.img /home/ubuntu/vm.img
 RUN chmod +777 /home/ubuntu/vm.img
 # Start QEMU and noVNC
 CMD /bin/bash -c " \
-    nohup qemu-system-aarch64 -cpu cortex-a53 -M raspi3b -m 1G -hda ~/vm.img -vnc :0 -daemonize -usbdevice tablet && \
+    nohup qemu-system-aarch64 -cpu cortex-a53 -M raspi3b -m 1G -hda ~/vm.img -vnc 127.0.0.1:0 -daemonize -usbdevice tablet && \
     cd /noVNC && \
-    websockify --web . 7860 localhost:5900"
+    ./novnc --listen 0.0.0.0:7860 --vnc 127.0.0.1:5900