adds USE_CPU and TORCH_DEVICE options, inspired by Aviyan's changes #729

	# This workflow will install Python dependencies, run tests and lint, using
	# different versions of Python.
	#
	# Notes:
	# - Requires special permission for Github workflows.
	# - For more information see following:
	# https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
	# https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
	# - Based initially on version from https://github.com/LimaBD/batspp.
	# - Running Github Actions with Docker: https://stackoverflow.com/a/64373702
	# - Docker documentation:
	# https://docs.docker.com/engine/reference/commandline/cli/
	# https://docs.docker.com/storage/bind-mounts
	#

	name: tests

	on: [push, pull_request]

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3

	- name: Build docker image
	run: \|
	docker build -t mezcla-dev -f- . <Dockerfile

	- name: Run tests
	run: \|
	## TODO???: put repo under /mnt/local-mezcla and installed version under /home/mezcla
	docker run --rm --mount type=bind,source="$(pwd)",target=/home/mezcla mezcla-dev

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