README example for loading model from local .pt file

[ndtreviv]

Is your feature request related to a problem? Please describe.
I want to package up this library in a docker container that doesn't have access to the internet.
The declaration: EdsrModel.from_pretrained('eugenesiow/edsr-base', scale=2) seems to fetch the pt file from huggingface (https://huggingface.co/eugenesiow/edsr-base/resolve/main/pytorch_model_2x.pt) every time it's called.
I'd rather it read that file from local disk.

Describe the solution you'd like
A README example of loading a pretrained model file from local disk.

Describe alternatives you've considered
N/A

Additional context
N/A