chore: update README.md #42

	name: Publish Docker image

	on:
	push:
	branches:
	- master
	release:
	types: [published]

	jobs:
	push_to_registry:
	name: Push Docker image to Docker Hub
	runs-on: ubuntu-latest
	permissions:
	packages: write
	contents: read
	attestations: write
	id-token: write
	steps:
	- name: Checkout
	uses: actions/checkout@v4

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

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

	- name: Login to Docker Hub
	uses: docker/login-action@v3
	with:
	username: ${{ secrets.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_TOKEN }}

	- name: Extract version from shard.yml
	id: extract_version
	run: \|
	VERSION=$(grep '^version:' shard.yml \| cut -d ' ' -f 2)
	echo "RELEASE_TAG=$VERSION" >> $GITHUB_ENV

	- name: Set tags
	id: set_tags
	run: \|
	if [[ "${{ github.event_name }}" == "release" ]]; then
	echo "TAGS=latest,${{ env.RELEASE_TAG }}" >> $GITHUB_ENV
	else
	echo "TAGS=latest" >> $GITHUB_ENV
	fi

	- name: Build and push image
	id: push
	uses: docker/build-push-action@v5
	with:
	context: .
	push: true
	platforms: linux/amd64,linux/arm64
	tags: sjdonado/bit:${{ env.TAGS }}

	- name: Attest
	uses: actions/attest-build-provenance@v1
	id: attest
	with:
	subject-name: sjdonado/bit
	subject-digest: ${{ steps.push.outputs.digest }}

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