[main] Update dependencies from dotnet/arcade #855

	name: Dockerfiles Build
	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main
	jobs:
	build:
	name: Build
	runs-on: ubuntu-latest
	steps:
	# Check out the branch
	- name: Checkout Code
	uses: actions/checkout@v2
	# Setup up builder
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v2
	# Run a build for the Dockerfiles but don't publish
	- name: Build Combined
	id: docker_combined
	uses: docker/build-push-action@v2
	with:
	context: ./
	file: ./samples/KubernetesIngress.Sample/Combined/Dockerfile
	push: false
	tags: microsoft/yarp-combined:latest
	- name: Build Ingress
	id: docker_ingress
	uses: docker/build-push-action@v2
	with:
	context: ./
	file: ./samples/KubernetesIngress.Sample/Ingress/Dockerfile
	push: false
	tags: microsoft/yarp-ingress:latest
	- name: Build Monitor
	id: docker_monitor
	uses: docker/build-push-action@v2
	with:
	context: ./
	file: ./samples/KubernetesIngress.Sample/Monitor/Dockerfile
	push: false
	tags: microsoft/yarp-monitor:latest
	- name: Build Backend
	id: docker_backend
	uses: docker/build-push-action@v2
	with:
	context: ./
	file: ./samples/KubernetesIngress.Sample/backend/Dockerfile
	push: false
	tags: microsoft/yarp-backend:latest

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