Add cpu-torch to photometry container

[wmwv]

Add cpu-only torch to the photometry container so we only make the container 200 MB bigger instead of 2500 MB bigger with all of GPU/nvidia/cuda full torch.

@rknop You said you already have a solution, so go for that.

@Bharath-Chowdhary-N suggested:
pip install torch --index-url https://download.pytorch.org/whl/cpu