Import cpp devcontainer image from deeplex/concrete #3

	name: Publish C++ Devcontainer Image

	on:
	push:
	branches:
	- master
	paths:
	- 'src/cpp/**'

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

	jobs:
	build-and-push-image:
	runs-on: ubuntu-latest

	permissions:
	contents: read
	packages: write

	steps:
	- name: Set up Docker Buildx
	# Setting up Docker Buildx with docker-container driver is required
	# at the moment to be able to use a subdirectory with Git context
	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@v4
	with:
	images: ${{ env.REGISTRY }}/deeplex/devcontainer-cpp
	flavor: \|
	latest=false
	prefix=ubuntu-22.04-,onlatest=true
	tags: \|
	type=raw,value=ubuntu-22.04

	- name: Build and push Docker image
	uses: docker/build-push-action@v5
	with:
	context: "{{defaultContext}}:src/cpp"
	push: true
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

Provide feedback