Merge pull request #661 from getodk/next #4

	name: GHCR

	on:
	workflow_dispatch:
	push:
	branches: [master]
	tags: ["v..*"]

	env:
	REGISTRY: ghcr.io

	jobs:
	build-push-image:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write

	strategy:
	matrix:
	image: [nginx, service]

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	with:
	fetch-depth: 0
	fetch-tags: true
	submodules: recursive

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

	- name: Extract Docker metadata
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ${{ env.REGISTRY }}/${{ github.repository_owner }}/central-${{ matrix.image }}

	- name: Set up QEMU emulator for multi-arch images
	uses: docker/setup-qemu-action@v3

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

	- name: Build and push ${{ matrix.image }} Docker image
	uses: docker/build-push-action@v5
	with:
	file: ${{ matrix.image }}.dockerfile
	context: .
	push: true
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}
	platforms: 'linux/amd64,linux/arm64'

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