How to pass current buffer as argument to a shell script?

[lando-tech]

I am trying to write a shell script that takes the current file/buffer as an argument.
A simple example:

#!/bin/bash python3 "$1" # Argument is the path to the current buffer

Is there a way to achieve this using a custom key binding in the config.toml?

Here is the current configuration I was experimenting with:

[keys.normal.'\'] R = ":run-shell-command ~/<path-to-script> {file-path}"

I just started using helix and I am still reading through the docs, but I haven't found anything yet on this particular feature or if it even exists.