Add Dockerfile for lc0

[john-sp]

Simple Dockerfile. Does not support downloading networks, nor is any network provided.

Example usage

docker build -t lc0 .

# Interactive mode:
docker run -gpus all -it -v /local/weights:/chess/weights lc0 --weights=/chess/weights/BT4-1740.pb.gz

## Training mode:
docker run --gpus all d lc0 -e TRAINING=true -e TRAINING_USER=foo -e TRAINING_PASSWORD=bar

Deepseek aided in the creation of this file, I have verified that everything is working.

[john-sp]

Docker vs native give different outputs for best move. Draft until I figure out why

[john-sp]

I tested more, 744706 seems odd, but BT4, T1 and 768x15x24h-t82-swa-7464000 are identical docker and native. As does. I am confident that it is fine

[borg323]

I tested more, 744706 seems odd, but BT4, T1 and 768x15x24h-t82-swa-7464000 are identical docker and native.

Was this tested with the cuda or the cudnn backend? Of the tested nets only 744706 actually uses the cudnn code paths, so that might be a clue.