Publish Docker image #5

	name: Publish Docker image

	on:
	release:
	types:
	- published

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

	jobs:
	check-tag-name-exists:
	runs-on: ubuntu-latest
	if: ${{ github.event.release.tag_name != '' }}
	steps:
	- run: "true"

	publish:
	needs: check-tag-name-exists
	runs-on: ubuntu-latest
	environment: release
	permissions:
	contents: read
	packages: write
	attestations: write
	id-token: write
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3

	- name: Login to GitHub Container Registry
	uses: docker/login-action@v3
	with:
	registry: ghcr.io
	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 }}
	flavor: \|
	latest=true
	tags: \|
	type=raw,value=${{ github.event.release.tag_name }}

	- name: Build and push Docker image
	id: push
	uses: docker/build-push-action@v6
	with:
	context: .
	push: true
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}
	cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache
	cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache,mode=max

	- 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

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