feat(github actions): adding github action to run release script and …

…push images to demo GAR repository

.github/workflows/build-and-push-images.yaml

@@ -0,0 +1,58 @@
+name: Rollouts Demo -- Build and Push Container Images to GAR
+
+on:
+  push:
+    branches:
+      - main
+
+env:
+  IMAGE_NAME: rollouts-demo
+  GAR_LOCATION: us
+  GCP_PROJECT_ID: moz-fx-cicd-demos-nonprod
+  IMAGE_NAMESPACE: us-docker.pkg.dev/moz-fx-cicd-demos-nonprod/cicd-demos-nonprod
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Run the release script to build demo container images
+        run: release.sh
+
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
+    steps:
+      - uses: actions/checkout@v4
+      - uses: docker/setup-buildx-action@v2
+      - id: gcp-auth
+        name: Google authentication
+        uses: google-github-actions/auth@v2
+        with:
+          token_format: "access_token"
+          service_account: artifact-writer@${{ env.GCP_PROJECT_ID }}.iam.gserviceaccount.com
+          workload_identity_provider: ${{ vars.GCPV2_GITHUB_WORKLOAD_IDENTITY_PROVIDER }}
+      - name: Log in to the container registry
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.GAR_LOCATION }}-docker.pkg.dev
+          username: oauth2accesstoken
+          password: ${{ steps.gcp-auth.outputs.access_token }}
+      - name: Push images to GAR
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          tags: |
+            ${{ env.IMAGE_NAMESPACE }}/${{ env.IMAGE_NAME }}:red
+            ${{ env.IMAGE_NAMESPACE }}/${{ env.IMAGE_NAME }}:orange
+            ${{ env.IMAGE_NAMESPACE }}/${{ env.IMAGE_NAME }}:blue
+            ${{ env.IMAGE_NAMESPACE }}/${{ env.IMAGE_NAME }}:purple
+            ${{ env.IMAGE_NAMESPACE }}/${{ env.IMAGE_NAME }}:slow-orange
+            ${{ env.IMAGE_NAMESPACE }}/${{ env.IMAGE_NAME }}:slow-red
+            ${{ env.IMAGE_NAMESPACE }}/${{ env.IMAGE_NAME }}:bad-orange
+            ${{ env.IMAGE_NAMESPACE }}/${{ env.IMAGE_NAME }}:bad-red
+          push: true
+          cache-from: type=gha
+          cache-to: type=gha,mode=max