Update actions/checkout action to v4 #178

	name: Create and publish a Docker image for main

	on:
	push:
	branches:
	- 'main'

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

	jobs:
	build-and-push-image:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write

	steps:
	- name: Checkout repository
	uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4

	- name: Log in to the Container registry
	uses: docker/login-action@465a07811f14bebb1938fbed4728c6a1ff8901fc # v2
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Extract metadata (tags, labels) for Docker
	id: meta
	uses: docker/metadata-action@818d4b7b91585d195f67373fd9cb0332e31a7175 # v4
	with:
	flavor: \|
	latest=true
	images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

	- name: Build and push Docker image
	uses: docker/build-push-action@2eb1c1961a95fc15694676618e422e8ba1d63825 # v4
	with:
	context: .
	push: true
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

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