Merge pull request #2360 from zetkin/release-241118 #17

	name: Build docker image

	on:
	push:
	branches:
	- "release"

	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: Checkout repository
	uses: actions/checkout@v4

	# Buildx is necessary for GitHub Actions caching to work
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3

	- 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 }}
	# The image will be tagged YYMMDD and YYMMDD-abcdef,
	# where abcdef is the shortform hash of the last commit
	tags: \|
	type=sha,prefix={{date 'YYMMDD'}}-
	type=raw,value={{date 'YYMMDD'}}
	type=raw,value=latest

	- name: Build and push Docker image
	id: push
	uses: docker/build-push-action@v5
	with:
	context: .
	file: ./env/frontend/Dockerfile
	push: true
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}
	cache-from: type=gha
	cache-to: type=gha,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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