Bump docker/setup-buildx-action from 2 to 3 #8

	name: Test PR

	# FIXME: Can we not build either job if stuff has been unchanged since last commit for that job?
	# FIXME: Use branch name for tagging docker build
	on:
	pull_request:
	branches:
	- main
	paths:
	- rootfs/**
	- .github/workflows/test-pr.yml

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

	jobs:
	deploy_ghcr_latest:
	name: Deploy Test to ghcr.io
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write

	steps:
	# Check out our code
	- name: Checkout
	uses: actions/checkout@v4

	# Set up QEMU for multi-arch builds
	- name: Set up QEMU
	uses: docker/setup-qemu-action@v2

	# Log into ghcr (so we can push images)
	- name: Login to ghcr.io
	uses: docker/login-action@v2
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.repository_owner }}
	password: ${{ secrets.GITHUB_TOKEN }}

	# Get metadata from repo
	- name: Extract metadata (tags, labels) for Docker
	id: meta
	uses: docker/metadata-action@v4
	with:
	images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

	# Set up buildx for multi platform builds
	- name: Set up Docker Buildx
	id: buildx
	uses: docker/setup-buildx-action@v3

	# Build & Push Dockerfile (test)
	- name: Build & Push ghcr.io/sdr-enthusiasts/docker-acarsdec:test
	uses: docker/build-push-action@v4
	with:
	context: .
	file: ./Dockerfile
	no-cache: true
	platforms: linux/386,linux/amd64,linux/arm/v7,linux/arm/v6,linux/arm64
	push: true
	tags: ghcr.io/sdr-enthusiasts/docker-acarsdec:test
	labels: ${{ steps.meta.outputs.labels }}

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