doc: Document oneliner to create Git Tag #122

	name: Build & Push Container Image
	on:
	push:
	branches:
	- master
	tags:
	- "v*"
	pull_request: {}

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

	jobs:
	# Push image to GitHub Packages.
	build_and_push:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write

	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: "0"

	- name: Log in to the Container Registry
	uses: docker/login-action@v3
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Determine Tags & Labels based on Git ref
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: "${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}"

	- name: Build & Push container image
	uses: docker/build-push-action@v6
	with:
	context: .
	file: ./Dockerfile
	push: true
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

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