update README #19

	name: Build and Push Docker Image to GHCR

	on:
	push:
	tags:
	- 'v..-' # always in this format

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

	jobs:
	build-and-push:
	runs-on: ubuntu-latest
	steps:
	# 1️⃣ Checkout the exact code for the tag
	- name: Checkout repository
	uses: actions/checkout@v3
	with:
	ref: ${{ github.ref }}

	# 2️⃣ Log in to GitHub Container Registry
	- name: Log in to GitHub Container Registry
	uses: docker/login-action@v2
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	# 3️⃣ Set Docker tags
	- name: Set Docker tags
	run: \|
	GIT_TAG="${GITHUB_REF#refs/tags/}" # e.g., v0.18.1-42
	echo "IMMUTABLE_TAG=$GIT_TAG" >> $GITHUB_ENV
	echo "FLOATING_TAG=${GIT_TAG%-*}" >> $GITHUB_ENV

	# 4️⃣ Build Docker image with ARGs
	- name: Build Docker image
	run: \|
	docker build \
	--build-arg BUILD_DATE=$(date -u +%Y-%m-%dT%H:%M:%S+00:00) \
	--build-arg VERSION=$IMMUTABLE_TAG \
	--build-arg COOKCLI_VERSION=$FLOATING_TAG \
	-t $IMAGE_NAME:$IMMUTABLE_TAG .

	docker tag $IMAGE_NAME:$IMMUTABLE_TAG $IMAGE_NAME:$FLOATING_TAG

	# 5️⃣ Push Docker image to GHCR
	- name: Push Docker image
	run: \|
	docker push $IMAGE_NAME:$IMMUTABLE_TAG
	docker push $IMAGE_NAME:$FLOATING_TAG

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