Updated docker image build action #50

	name: Docker

	on:
	workflow_dispatch:
	#
	push:
	tags:
	- '*'

	env:
	# Use GitHub container registry
	REGISTRY: ghcr.io
	# github.repository as <account>/<repo>
	IMAGE_NAME: ${{ github.repository }}


	jobs:
	build:

	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@v3

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

	# https://github.com/docker/login-action
	- name: Login to GitHub Container Registry
	uses: docker/login-action@v3
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	# https://github.com/docker/metadata-action
	- name: Extract Docker metadata
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

	# https://github.com/docker/build-push-action
	- name: Build and push Docker image
	uses: docker/build-push-action@v5
	with:
	context: .
	file: ./docker/Dockerfile
	platforms: linux/amd64,linux/arm64,linux/arm/v7
	push: ${{ github.event_name != 'pull_request' }}
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

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