Update README.md #21

	name: Build & Publish Docker Image

	on:
	push:
	branches:
	- main
	- container-setup
	tags:
	- 'v*' # optional: trigger on version tags like v1.2.3
	workflow_dispatch:
	inputs:
	version:
	description: 'Image version'
	required: true
	default: 'latest'


	jobs:
	build-and-push:
	runs-on: ubuntu-latest
	env:
	DEFAULT_TAG: 'latest'
	permissions:
	contents: read # to checkout code
	packages: write # to publish package
	id-token: write # if you use OIDC

	steps:
	- name: Checkout repository
	uses: actions/checkout@v3

	- name: Determine image version
	id: set_version
	run: \|
	# 1) dispatch → use the input
	if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
	TAG="${{ github.event.inputs.version }}"
	# 2) tag → use the tag name (v1.2.3)
	elif [[ "${GITHUB_REF}" =~ ^refs/tags/(v.+)$ ]]; then
	TAG="${BASH_REMATCH[1]}"
	# 3) branch push → use our DEFAULT_VERSION
	else
	TAG="$DEFAULT_TAG"
	fi

	echo "TAG=$TAG" >> $GITHUB_ENV

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

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

	- name: Build and push image
	uses: docker/build-push-action@v4
	with:
	context: .
	file: ./ContainerFile
	push: true
	tags: \|
	ghcr.io/${{ github.repository_owner }}/popins4snake:${{ env.TAG }}
	ghcr.io/${{ github.repository_owner }}/popins4snake:latest


	- name: Output image reference
	run: echo "Published ghcr.io/${{ github.repository_owner }}/popins4snake:${{ env.TAG }}"

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