test out ARG in FROM #84

	name: build-docker-image

	on:
	workflow_dispatch:
	push:
	paths:
	- 'Dockerfile'
	- '.github/workflows/buildImage.yml'

	env:
	REGISTRY: ghcr.io

	jobs:
	build-image:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write
	strategy:
	matrix:
	# python-version: ["3.7", "3.8", "3.9", "3.10"]
	python-version: ["3.8"]
	base_stage: ["stage3", "stage4"]
	steps:
	- name: Checkout repository
	uses: actions/checkout@v3

	- name: Log in to the Container Registry
	uses: docker/login-action@v2
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v2

	# use the multistage docker build action instead of docker's action
	- uses: firehed/multistage-docker-build-action@v1
	id: build
	with:
	context: .
	repository: ${{ env.REGISTRY }}/${{ github.repository }}/learn-maintenance-image-${{ matrix.python-version }}
	tag-latest-on-default: true
	stages: stage1, stage2, stage3
	server-stage: stage5
	parallel: true
	build-args: \|
	PY_VERSION=${{ matrix.python-version }}
	base_stage=${{ matrix.base_stage }}

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