Any way to Dynamically create assets?

[wlraider70]

Is there a way for my design to create a photo and put it into signage without logging into the controls?
I can do the automation on the backend, but I'm thinking of an email address or shared folder they can just put the file into.
Can I ssh a file into a certain folder on the pi?

Is there any documentation on how to do this or something similar?

[hitesh83]

One way I use is, host basic HTML with <img src="xyz.jpg" > and other css to display image full screen .

Pi can display a url something like https://mywebsite.com/pi/show_image.html

I keep replacing xyz.jpg to new image with same name in hosted folder.