fix: novnc disconnected if idle 1 min
fix: novnc disconnected if idle 1 min

fcwu/docker-ubuntu-vnc-desktop,alexlib/docker-ubuntu-vnc-desktop,alexlib/docker-ubuntu-vnc-desktop,alexlib/docker-ubuntu-vnc-desktop,alexlib/docker-ubuntu-vnc-desktop,fcwu/docker-ubuntu-vnc-desktop,alexlib/docker-ubuntu-vnc-desktop,alexlib/docker-ubuntu-vnc-desktop,fcwu/docker-ubuntu-vnc-desktop,alexlib/docker-ubuntu-vnc-desktop,fcwu/docker-ubuntu-vnc-desktop