x2vnc
Link a VNC and an X display together, simulating a multiheaded display
RUN apt-get update && \
apt-get install -y x2vnc
RUN apt-get update && \
apt-get install -y x2vnc
RUN apt-get update && \
apt-get install -y x2vnc
RUN apt-get update && \
apt-get install -y x2vnc