Update README.md #72

	name: Build and publish image to ghcr.io/epics-containers

	on:
	push:
	pull_request:

	jobs:
	build:
	# pull requests are a duplicate of a branch push if within the same repo.
	if: github.event_name != 'pull_request' \|\| github.event.pull_request.head.repo.full_name != github.repository
	permissions:
	contents: read
	packages: write
	strategy:
	fail-fast: true
	matrix:
	target: [developer, runtime]
	# add more targets here and add a Dockerfile.${{ matrix.target }} to the repo
	target_architecture: [beatnik]


	runs-on: ubuntu-latest
	env:
	TAG: ghcr.io/${{ github.repository_owner }}/rtems-${{ matrix.target_architecture }}-${{ matrix.target }}
	steps:

	- name: Log in to GitHub Docker Registry
	uses: docker/login-action@v3
	with:
	registry: ghcr.io/${{ github.repository_owner }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

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

	- name: Build image
	uses: docker/build-push-action@v5
	with:
	file: Dockerfile.${{ matrix.target_architecture }}
	target: ${{ matrix.target }}
	tags: ${{ env.TAG }}:${{ github.ref_name }},${{ env.TAG }}:latest
	cache-from: type=gha,scope=${{ matrix.target }}
	cache-to: type=gha,mode=max,scope=${{ matrix.target }}
	load: true

	- name: Test image
	run: echo 'no tests yet'

	- name: Push image
	if: ${{ github.event_name == 'push' && github.ref_type == 'tag' }}
	uses: docker/build-push-action@v5
	with:
	file: Dockerfile.${{ matrix.target_architecture }}
	tags: ${{ env.TAG }}:${{ github.ref_name }},${{ env.TAG }}:latest
	push: true

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