Update container build to only push on merges #1224

	name: Build samples

	on:
	workflow_dispatch:
	push:
	branches:
	- edge
	- v.
	pull_request:
	types: [opened, synchronize, reopened, closed]
	branches:
	- edge
	- v.

	concurrency:
	group: build-${{ github.event.pull_request.number \|\| github.sha }}
	cancel-in-progress: true

	env:
	VERSION: ${{ github.event.pull_request.number \|\| 'latest' }}
	# Use ghcr.io/radius-project/dev for PR build. Otherwise, use ghcr.io/radius-project.
	CONTAINER_REGISTRY: ${{ github.event.pull_request.number && 'ghcr.io/radius-project/dev' \|\| 'ghcr.io/radius-project' }}

	jobs:
	build-ghcr:
	name: Build and push sample images to GHCR
	if: github.event.action != 'closed'
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write
	strategy:
	fail-fast: false
	matrix:
	include:
	- directory: samples/demo/
	image: samples/demo
	- directory: samples/dapr/ui/
	image: samples/dapr-frontend
	- directory: samples/dapr/nodeapp/
	image: samples/dapr-backend
	- directory: samples/aws/
	image: samples/aws
	- directory: samples/aws-sqs/
	image: samples/aws-sqs
	- directory: samples/volumes/
	image: samples/volumes
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	- name: Login to GitHub Container Registry
	uses: docker/login-action@v2
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}
	- name: Build and push ${{ matrix.image }}
	uses: docker/build-push-action@v4
	with:
	context: ./${{ matrix.directory }}
	push: ${{ github.event_name == 'push' && true \|\| false }}
	tags: ${{ env.CONTAINER_REGISTRY }}/${{ matrix.image }}:${{ env.VERSION }}

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