Notes app for Android won't display local images

The Markdown renders with image on my computer in various Markdown editors. The Markdown renders on the web page for my instance using the Notes app there.

Using the Notes app, images are not displayed. The image is in the same directory as the note.

I get the expected results if I put the image on my regular web site and use the URL. Image displays in notes.

I just don’t want to put this particular image on an open web site just to get it to show up in my notes.

What’s the secret?