Refactor wrapping host functions #21

	name: Build Docker images

	on: ["push"]

	jobs:
	docker:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	include:
	- dockerfile: ./worker/Dockerfile
	image: drogus/crows-worker
	context: .
	- dockerfile: ./coordinator/Dockerfile
	image: drogus/crows-coordinator
	context: .
	- dockerfile: ./cli/Dockerfile
	image: drogus/crows-client
	context: .
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	- name: Docker meta
	id: meta
	uses: docker/metadata-action@v4
	with:
	images: \|
	ghcr.io/${{ matrix.image }}
	# generate Docker tags based on the following events/attributes
	tags: \|
	type=ref,event=branch
	type=sha
	latest
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v1
	# So now you can use Actions' own caching!
	- name: Log in to the Container registry
	uses: docker/login-action@v1
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}
	- name: Build and push
	uses: docker/build-push-action@v2
	with:
	context: ${{ matrix.context }}
	file: ${{ matrix.dockerfile }}
	push: true
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

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