Change the Dockerfile and Github workflow to support multiple platform builds #13

	name: build and push to quay

	on:
	push:
	tags:
	- 'v' # tags matching v, i.e. v0.0.1, v1.0.0-rc.0

	pull_request:
	branches:
	- main
	- release-[0-9]+.[0-9]+

	env:
	VERSION_TAG: ${{ github.ref_name }}
	REPOSITORY: quay.io/gatekeeper/gatekeeper

	jobs:
	build:
	name: Image build and push
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

	- uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491
	with:
	go-version: "1.22"
	check-latest: true

	- name: build
	run: \|
	REPOSITORY=${{env.REPOSITORY}} VERSION=${{env.VERSION_TAG}} \
	PLATFORM="linux/amd64,linux/arm64,linux/arm/v7" OUTPUT_TYPE=type=registry GENERATE_ATTESTATIONS=true make docker-buildx-release

	- uses: docker/login-action@v2
	with:
	registry: quay.io
	username: ${{ secrets.QUAY_USER }}
	password: ${{ secrets.QUAY_PASSWORD }}



	- name: push
	run: \|
	docker push ${{env.REPOSITORY}}:${{env.VERSION_TAG}}

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