docker build -t aospan/joker-vnc .
docker run -it --name vnc -p 5901:5901 -e VNCPASSWORD=secret aospan/joker-vnc
now you can connect from remote client to this VNC server using any VNC client. For example: vncviewer 192.168.1.98:1
appuser@935a560dc96c:/$ xeyes