Docker: include explicit linux/arm64/v8 platform. #2

	# SPDX-FileCopyrightText: 2023 Diego Elio Pettenò
	#
	# SPDX-License-Identifier: 0BSD

	name: docker-build

	on: [push]

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

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

	steps:
	- name: Checkout repository
	uses: actions/checkout@v3

	- name: Set up QEMU
	uses: docker/setup-qemu-action@v2
	with:
	platforms: 'arm64'

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v2
	with:
	platforms: 'linux/amd64,linux/arm64/v8'

	- name: Log in to the Container registry
	uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Extract metadata (tags, labels) for Docker
	id: meta
	uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
	with:
	images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

	- name: Build and push Docker image
	uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
	with:
	context: .
	push: true
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

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