add: multiarch docker image build (#1059) #480

	name: Docker
	on:
	push:
	branches:
	- master
	tags:
	- "v?[0-9]+.[0-9]+.[0-9]+"
	- "v?[0-9]+.[0-9]+.[0-9]+-rc.[0-9]+"
	- "v?[0-9]+.[0-9]+.[0-9]+-dev.[0-9]+"
	# pull_request:
	env:
	PLATFORMS: linux/amd64,linux/arm64
	jobs:
	docker:
	name: Docker
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v3
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v2
	- name: Cache Docker layers
	uses: actions/cache@v3
	with:
	path: /tmp/.buildx-cache
	key: ${{ runner.os }}-buildx-${{ github.ref }}
	restore-keys: \|
	${{ runner.os }}-buildx-
	- name: Determine tag or commit
	uses: haya14busa/action-cond@v1
	id: refortag
	with:
	cond: ${{ startsWith(github.ref, 'refs/tags/') }}
	if_true: ${{ github.ref }}
	if_false: latest
	- name: Determine image tag
	id: imagetag
	run: echo "value=${TAG_OR_BRANCH##*/}" >> $GITHUB_OUTPUT
	env:
	TAG_OR_BRANCH: ${{ steps.refortag.outputs.value }}

	- name: Login to GitHub Container Registry
	uses: docker/login-action@v2
	with:
	registry: ghcr.io
	username: ${{ github.repository_owner }}
	password: ${{ secrets.CR_PAT }}
	- name: Build kafka-operator
	uses: docker/build-push-action@v3
	with:
	tags: ghcr.io/banzaicloud/kafka-operator:${{ steps.imagetag.outputs.value }}
	file: Dockerfile
	platforms: ${{ env.PLATFORMS }}
	push: true
	cache-from: type=local,src=/tmp/.buildx-cache
	cache-to: type=local,dest=/tmp/.buildx-cache

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