error running the demo code on nvidia-docker

[ShaminiKoravuna]

I was trying to run the demo code on a nvidia-docker and I'm getting the following error

# qlua main.lua demo
Unable to connect X11 server (continuing with -nographics)
qlua: not loading module qtgui (running with -nographics)...............................]  ETA: 5s714ms | Step: 952ms  
qlua: qtwidget window functions will not be usable (running with -nographics)
qtwidget window functions will not be usable (running with -nographics)
qlua: not loading module qtuiloader (running with -nographics)
qlua: /root/torch/install/share/lua/5.1/image/init.lua:1647: attempt to index global 'qtuiloader' (a nil value)
stack traceback:
[C]: in function '__index'
/root/torch/install/share/lua/5.1/image/init.lua:1647: in function 'window'
/root/torch/install/share/lua/5.1/image/init.lua:1598: in function 'display'
main.lua:74: in main chunk
Segmentation fault (core dumped)

Can anyone help me out with this?

Thanks in Advance!!!