Merge pull request #68 from serlo/build/transpile-bundle-backend-esbuild #51

	name: Push Docker Image

	on:
	push:
	paths:
	- 'package.json'

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

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

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

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3

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

	- name: Extract metadata (tags, labels) for Docker
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

	- name: Get version from package.json
	id: package-version
	run: \|
	VERSION=$(grep -m1 '"version":' package.json \| awk -F: '{ print $2 }' \| sed 's/[", ]//g')
	echo "VERSION=$VERSION" >> $GITHUB_OUTPUT

	- name: Check if version exists
	id: check-version
	run: \|
	if docker manifest inspect ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.package-version.outputs.VERSION }} > /dev/null 2>&1; then
	echo "exists=true" >> $GITHUB_OUTPUT
	else
	echo "exists=false" >> $GITHUB_OUTPUT
	fi

	- name: Build and push Docker image
	if: steps.check-version.outputs.exists == 'false'
	uses: docker/build-push-action@v6
	with:
	context: .
	file: Dockerfile.dev
	push: true
	tags:
	${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{
	steps.package-version.outputs.VERSION }}
	labels: ${{ steps.meta.outputs.labels }}

Provide feedback