feat: add first example workflow #1

	name: image cosign workflow
	on: push
	jobs:
	image_build_push_job:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write
	id-token: write
	steps:
	- name: login-quay
	uses: docker/login-action@v3
	with:
	registry: quay.io/rh-ee-asavage
	username: ${{ secrets.USERNAME }}
	password: ${{ secrets.PASSWORD }}
	- name: install-cosign
	uses: sigstore/cosign-installer@main
	with:
	cosign-release: 'v2.2.4'
	- name: check-cosign-install
	run: cosign version
	- name: build-sign-push
	run: \|
	echo "Test message build-sign-push"
	cat > ./Dockerfile <<EOF
	FROM alpine
	CMD ["echo", "Hello container!"]
	EOF
	docker build -t quay.io/rh-ee-asavage/gha-image-test:latest .
	docker push quay.io/rh-ee-asavage/gha-image-test:latest
	cosign sign -y quay.io/rh-ee-asavage/gha-image-teslatest
	echo "Success build-sign-push"

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