Docker container share screen over VNC - docker

Question

I am trying to follow the following dockerfile to create a container with qtCreator and run the container with the following command
docker run -it --rm -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix qtcreator
however this is throwing an error as below
PS D:\Docker\qtcreator> docker run -it --rm -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix qtcreator
QXcbConnection: Could not connect to display
Aborted
I tried to change the file a bit that looks as below based on some research I did to install VNC on this container.
FROM ubuntu:14.04
# Install vnc, xvfb in order to create a 'fake' display and qtcreator
RUN apt-get update && apt-get install -y qtcreator x11vnc xvfb
run mkdir ~/.vnc
# Setup a password
run x11vnc -storepasswd 1234 ~/.vnc/passwd
RUN export uid=1000 gid=1000 && \
mkdir -p /home/developer && \
echo "developer:x:${uid}:${gid}:Developer,,,:/home/developer:/bin/bash" >> /etc/passwd && \
echo "developer:x:${uid}:" >> /etc/group && \
echo "developer ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers.d/developer && \
chmod 0440 /etc/sudoers.d/developer && \
chown ${uid}:${gid} -R /home/developer
USER developer
ENV HOME /home/developer
CMD /usr/bin/qtcreator
after this I tried to run this container using the following command
docker run -p 5900 -it --rm -v /tmp/.X11-unix:/tmp/.X11-unix qtcreator x11vnc -forever -usepw -create
this command seams to run and wait for termination I think, as the PS does not return back.
as I am new to docker can some one please let me know how to connect my VNC Client on my windows 10 parent machine or from a remote machine to the vnc server running in this container. i.e. how do I find the IP Address and port number to connect.
UPDATE 1
when i run the command docker ps --filter "status=running" I see the following log
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a2ab1397bb2b qtcreator "x11vnc -forever -..." About an hour ago Up About an hour 0.0.0.0:32770->5900/tcp clever_haibt
69754e382042 qtcreator "x11vnc -forever -..." 2 hours ago Up 2 hours priceless_hugle