BLD: build and use docker images in ghcr #2

	name: Build images

	on:
	pull_request:
	branches: [ "main" ]
	schedule:
	- cron: "15 0 * * *"
	workflow_dispatch:

	env:
	REGISTRY: ghcr.io
	IMAGE_NAME: ${{ github.repository }}

	jobs:
	build-container:
	permissions:
	contents: read
	packages: write
	attestations: write
	id-token: write
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["310", "311", "312"]
	steps:
	- name: Setup dockerfile
	run: \|
	cp containers/v3-dockerfile-test-suite-python${{ matrix.python-version }} Dockerfile

	- name: Login to the Container registry
	uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Extract metadata (tags, labels) for Docker
	id: meta
	uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
	with:
	images: ghcr.io/${{ env.IMAGE_NAME }}-PY${{ matrix.python-version }}

	- name: Build and push Docker image
	id: push
	uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
	with:
	context: .
	# only push from main
	push: github.ref == 'refs/heads/main'
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

	- name: Generate artifact attestation
	uses: actions/attest-build-provenance@v1
	with:
	subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
	subject-digest: ${{ steps.push.outputs.digest }}
	push-to-registry: true

Provide feedback