This fixes errors reading /etc/ssl/private and /proc/tty/driver which seem specific to the dev command — I'm not really sure why this isn't a problem in the Dockerfile, presumably it's a difference of base image, but we use dev there since it's an example of a local development image.

That's weird, is fastapi trying to generate dev certificates?

Hmmm I tried it with dev rather than run but I can't repro the issue

Did you just do the build? The error is on run.

docker build -f multistage.Dockerfile . -t uv-multistage     
docker run --rm -it --publish 8000:8000 uv-multistage

Indeed (I had built and ran it), no errors 😅

Maybe try fastapi dev --no-reload?

I noticed Will watch for changes in these directories: ['/'] rather than /app.

Doesn't that sort of defeat the point of using dev? :D

I think I prefer run for these images anyway, since they're more production focused with the staged build.

I only use dev in Dockerfile because it's linked to the compose example.

Yea I think thats it, workdir is missing in the multistage/standalone versions

Oh that's interesting, thanks!