Share an image url from Nextcloud
Append /preview to the url.
Paste into Discourse.
Image embed is not displayed 
Anything new to this? I would like to know as well! Would be super nice to have this feature!
Where is the benefit of adding the preview suffix?
Saving data?
I walk through exactly what this means in the original post. It has been a feature of Nextcloud for quite a while now, which still almost no one knows about.
You display a photo directly rather than a url. Posting the url with /preview appended should display the image (as though you’d uploaded it directly to the forum) like this:
Created a post to Discourse about this issue here.