Adding ability to publish image to GitHub container regsitry (#3) #3

	---
	name: container build

	on: [push]

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

	jobs:
	docker:
	runs-on: ubuntu-latest

	permissions:
	contents: read
	packages: write
	attestations: write
	id-token: write

	steps:

	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Set up QEMU
	uses: docker/setup-qemu-action@v3

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

	- name: Login to GitHub 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 }}

	- name: Build and push
	id: push
	uses: docker/build-push-action@v6
	with:
	context: .
	push: true
	platforms: linux/amd64,linux/arm64
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

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