Add github actions to publish images to GH registry #1

	name: image-build-test
	on: [push, pull_request]

	env:
	BUILD_PLATFORMS: linux/amd64,linux/arm64,linux/ppc64le

	jobs:
	build-image:
	runs-on: ubuntu-latest
	steps:
	- name: Check out the repo
	uses: actions/checkout@v4

	# Add support for more platforms with QEMU (optional)
	# https://github.com/docker/setup-qemu-action
	- name: Set up QEMU
	uses: docker/setup-qemu-action@v3

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

	- name: Prepare version file
	run: ./hack/get_version.sh > .version

	- name: Build and push container image
	uses: docker/build-push-action@v5
	with:
	context: .
	push: false
	# no need to explicitly set goarch,
	# correct arch will be selected for each build platform
	build-args: \|
	goarch=
	platforms: ${{ env.BUILD_PLATFORMS }}
	file: ./cmd/Dockerfile

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