Since imgur was blocked in the UK I was searching for an alternative way to occasuonally share photos on a Usenet group I'm in. (Text group, not binary, of course.)
I ended up just settling on a Hugo static site. It's not quite drag and drop, but close enough for me - I just drag the photos into a content directory, run a build script and push the repo - argo deploys it.
Because it's just plain old httpd serving static files, in a container, it's about as safe/stable as I can make it.