Fix README.md stating the wrong flag for levels (#122) #3

	# GitHub actions workflow which builds and publishes the docker images.

	name: Build and push docker images

	on:
	push:
	tags: ["v*"]
	branches: [ main ]
	workflow_dispatch:

	permissions:
	contents: read
	packages: write

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Set up QEMU
	id: qemu
	uses: docker/setup-qemu-action@v2
	with:
	platforms: arm64

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

	- name: Inspect builder
	run: docker buildx inspect

	- name: Log in to DockerHub
	uses: docker/login-action@v2
	with:
	username: ${{ secrets.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_TOKEN }}

	- name: Log in to GHCR
	uses: docker/login-action@v2
	with:
	registry: ghcr.io
	username: ${{ github.repository_owner }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Calculate docker image tag
	id: set-tag
	uses: docker/metadata-action@master
	with:
	images: \|
	ghcr.io/${{ github.repository }}
	docker.io/${{ secrets.DOCKERHUB_USERNAME }}/${{ github.event.repository.name }}
	flavor: \|
	latest=false
	tags: \|
	type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
	type=semver,pattern=v{{version}}
	type=semver,pattern=v{{major}}.{{minor}}

	- name: Build and push all platforms
	uses: docker/build-push-action@v4
	with:
	push: true
	labels: "gitsha1=${{ github.sha }}"
	tags: "${{ steps.set-tag.outputs.tags }}"
	platforms: linux/amd64,linux/arm64

	# arm64 builds OOM without the git fetch setting. c.f.
	# https://github.com/rust-lang/cargo/issues/10583
	build-args: \|
	CARGO_NET_GIT_FETCH_WITH_CLI=true
	BUILD_PROFILE=release

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