@ahuang11 Thank you. I got it to work (I am completely new to holoviews; sorry for the newbie questions).
For the benefit of anybody else, here is a solution:
import holoviews as hv
import panel as pn
pn.extension()
tempfile = '../_temp/my.png'
im = hv.RGB.load_image(tempfile)
pn.Column(
pn.pane.HoloViews(im),
).servable()
Thanks again.