Jupyter Demo Support File(s) for UNIHIKER

The Jupyter demo for UNIHIKER, 02 Little Light Catcher, is stuck at:

img = gui.draw_image(x=0, y=0, w=240, h=320, image='light-1.png') # Display the initial background image 'light-1'
value = gui.draw_text(x=155, y=30, text='0', font_size=18) # Display the initial light value

presumably because the app cannot find light-1.png based on my simplistic understanding. Someone else had posted a question on the availability of these light-* png files but did not receive any posted answer. Can someone assist, please? Thanks.

Regards.

P.S.

I can confirm that the web browser is pointing to the Jupyter url on UNIHIKER:

http://10.1.2.3:8888/notebooks/02%20Little%20Light%20Catcher.ipynb