Update actions/checkout action to v4 #945

	name: lint, test and build image
	on: [pull_request, push]

	jobs:
	lint-test:
	runs-on: ubuntu-latest
	steps:
	- name: Install Go
	uses: actions/setup-go@v4
	with:
	go-version: '^1.19'

	- name: Checkout code
	uses: actions/checkout@v4

	- name: golangci-lint
	uses: golangci/golangci-lint-action@v3
	with:
	args: --config .golangci.yml
	version: v1.51.2

	- name: Test
	run: go test ./...

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v2

	- name: Build image - no push
	id: dockerbuild
	uses: docker/build-push-action@v4
	with:
	context: .
	push: false
	tags: ghcr.io/equinixmetal/ironlib:latest

	- name: Scan image
	id: scan
	uses: anchore/scan-action@v3
	with:
	image: ghcr.io/equinixmetal/ironlib:latest
	acs-report-enable: true
	# TODO(jaosorior): Fail build once we migrate off CentOS.
	fail-build: false

	- name: Inspect action SARIF report
	run: cat ${{ steps.scan.outputs.sarif }}
	# This should run even if we fail the container scan
	if: always()

Provide feedback