Update Docker file

[rasbt]

Currently going through older issues and trying to fix the Docker issues in #652. This basically uses the linux built-in curl for downloading the uv installation instead of ADD.

CCing @d-kleine as the Docker expert :)

Fixes #652

[d-kleine]

I took the code for the Dockerfile from the official uv instructions that uses ADD: https://docs.astral.sh/uv/guides/integration/docker/#installing-uv

[rasbt]

Oh I see, not sure why this was causing problems for some.

[d-kleine]

This would be the correct curl command: https://docs.astral.sh/uv/getting-started/installation/

To be honest, I think it would be better to keep the Dockerfile as it is. For me, this looks like a singular issue reported without any error details, reproduction steps or valid evidence. I double-checked the report back in the day, and there were no issues after all. Furthermore, changing the code might break the config, or require extra steps, e.g. for permissions.

As long as users stick to the Docker Environment Setup Guide, everything should be fine.

[rasbt]

Thanks, and noted. Let's leave it as is for now as it is the officially recommended way. Thanks for looking into it!