Build docker image in CI and publish on release #1

	name: Create and publish a Docker image

	on:
	pull_request:
	push:
	branches:
	- master
	release:
	types:
	- published

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

	jobs:
	build-and-push-image:
	runs-on: ubuntu-latest

	permissions:
	contents: read
	packages: write
	attestations: write
	id-token: write

	steps:
	- name: Set push flag
	run: echo "PUSH=${{ github.event_name == 'release' && github.event.action == 'published' }}" >> $GITHUB_ENV

	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Log in to the Container registry
	uses: docker/login-action@v3
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Extract metadata (tags, labels) for Docker
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

	- name: Build and push Docker image
	id: push
	uses: docker/build-push-action@v6
	with:
	context: .
	push: ${{ env.PUSH == 'true' }}
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

	- name: Generate artifact attestation
	uses: actions/attest-build-provenance@v2
	if: ${{ env.PUSH == 'true' }}
	with:
	subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
	subject-digest: ${{ steps.push.outputs.digest }}
	push-to-registry: true

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