add cd workflow (continuation) #4

	name: CD

	on:
	pull_request:
	branches: [master] # Temporary trigger
	workflow_run:
	workflows: [CI]
	branches: [master]
	types:
	- completed

	env:
	GO_VERSION: ^1.21.5
	REGISTRY: ghcr.io
	IMAGE_NAME: ${{ github.repository }}
	TAG: sha-${{ github.sha }}

	jobs:
	deploy:
	runs-on: ubuntu-latest
	permissions:
	contents: "read"
	packages: write
	id-token: "write"
	steps:
	- name: Check out code
	uses: actions/checkout@v4

	- name: Login to GitHub Container Registry
	uses: docker/login-action@v3
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Pull image
	run: docker pull ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.TAG }}

	- name: Tag image as latest
	run: docker tag ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.TAG }} ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest

	- name: Push latest image
	run: docker push ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest

	- name: Log into Google Cloud Platform
	uses: "google-github-actions/auth@v2"
	with:
	project_id: "go-modproxy"
	workload_identity_provider: ${{ secrets.GOOGLE_WORKLOAD_IDENTITY_PROVIDER_NAME }}
	- name: "Set up Google Cloud SDK"
	uses: "google-github-actions/setup-gcloud@v2"
	with:
	version: ">= 461.0.0"

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