I used the command to install DS found on the git page

docker compose --profile download up --buil

And then to run Automatic1111 I used the following command

docker compose --profile auto up --build

You should put your models inside the folder model/StableDiffusion that is in your host machine.

Actually I tried running it, the correct folder would be. [PATH_TO_WHERE_YOU_GIT_CLONE]/stable-diffusion-webui-docker/data/models/Stable-diffusion

So I had a sudden thought, went back and tried a different model file that is a .ckpt file rather than the .pth files I was testing with. This worked, so obviously it was a simple matter of the wrong file type. Now I feel foolish!

Out of curiosity, what is the .pth file type used for?

Never install .ckpt checkpoints (unless you’re 1000% sure of the source. Always use safetensors files instead.
Hmm, that’s a good point. I’ve just looked up the difference. Thanks