CUDA builds failing due to missing fmt header #3233
Description
The CUDA builds are failing due to missing fmt/base.h, which I suspect is because the docker container they're running in is using an old version of fmt.
The container is also using gcc 9.4 and ubunutu 20.04, which are now both quite old, so it would be good to have a refresh of the Dockerfile -- unfortunately, I don't know where it lives! @ggeorgakoudis it looks like we're pulling the image from your packages -- do you know where the corresponding Dockerfile is, so I can update it?