Bump docker/build-push-action from 5 to 6 #56

	name: Publish Docker Image
	# https://www.docker.com/blog/first-docker-github-action-is-here
	# https://github.com/docker/build-push-action
	on: # Trigger the workflow on push or pull request, but only for the master branch
	push:
	branches: [master]
	pull_request:
	branches: [master]

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}-${{ github.head_ref }}-${{ github.event_name }}
	cancel-in-progress: ${{ github.ref != 'refs/heads/master' }}

	env:
	PUSH_TO_HUB: ${{ github.ref == 'refs/heads/master' }}

	jobs:
	build-push:
	runs-on: ubuntu-20.04
	strategy:
	matrix:
	python-version: ["3.8", "3.9", "3.10", "3.12"]
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	# https://github.com/docker/setup-buildx-action
	# Set up Docker Buildx - to use cache-from and cache-to argument of buildx command
	- uses: docker/setup-buildx-action@v3
	- name: Login to DockerHub
	uses: docker/login-action@v3
	if: env.PUSH_TO_HUB == 'true'
	with:
	username: ${{ secrets.DOCKER_USERNAME }}
	password: ${{ secrets.DOCKER_PASSWORD }}

	- name: Build and Publish to Docker Hub
	# publish master
	uses: docker/build-push-action@v6
	# https://github.com/docker/build-push-action#cache-to-registry
	with:
	build-args: \|
	PYTHON_VERSION=${{ matrix.python-version }}
	cache-from: type=registry,ref=borda/docker_sample:py${{ matrix.python-version }}
	cache-to: type=inline
	file: Dockerfile
	push: ${{ env.PUSH_TO_HUB }}
	tags: borda/docker_sample:py${{ matrix.python-version }}
	timeout-minutes: 25

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