Maybe I’m overthinking this. I want something with a drag and drop interface that then gives me a link to paste into discord or a forum to show the image directly, as Imgur does.
I could just use a bare web server but I’d have to scp the images over every time.
Slink might be easy enough to set up with Docker: https://docs.slinkapp.io/getting-started/02-quick-start/
Upd 22:04: tried setting it up with Podman instead of Docker, and the instructions didn’t work, first because of missing directories and then a permission issue. However, this can be because I tried on WSL rather than a dedicated GNU/Linux box.