Add multisite feature to operator #5

	name: Publish multiarch postgres-operator image on ghcr.io

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

	on:
	push:
	tags:
	- '*'
	jobs:
	publish:
	name: Build, test and push image
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write
	steps:
	- name: Checkout repository
	uses: actions/checkout@v3

	- uses: actions/setup-go@v2
	with:
	go-version: "^1.19.8"

	- name: Run unit tests
	run: make deps mocks test

	- name: Define image name
	id: image
	run: \|
	IMAGE="${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${GITHUB_REF/refs\/tags\//}"
	echo "NAME=$IMAGE" >> $GITHUB_OUTPUT

	- name: Set up QEMU
	uses: docker/setup-qemu-action@v2

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v2

	- name: Login to GHCR
	uses: docker/login-action@v2
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Build and push multiarch image to ghcr
	uses: docker/build-push-action@v3
	with:
	context: .
	file: docker/Dockerfile
	push: true
	build-args: BASE_IMAGE=alpine:3.15
	tags: "${{ steps.image.outputs.NAME }}"
	platforms: linux/amd64,linux/arm64

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