Switch from GCR to Artifact Registry

GCR has been deprecated; using europe-west3-docker.pkg.dev instead.
Also bump action versions to v4/v2.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: kitallis

.github/workflows/deploy.yml

@@ -8,10 +8,10 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up Node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: "18"
           cache: "npm"
@@ -30,30 +30,30 @@ jobs:
       id-token: "write"
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - id: "auth"
         name: "Authenticate to Google Cloud"
-        uses: "google-github-actions/auth@v1"
+        uses: "google-github-actions/auth@v2"
         with:
           workload_identity_provider: "projects/${{ secrets.PROJECT_NUMBER }}/locations/global/workloadIdentityPools/github-pool/providers/github-provider"
           service_account: "github-actions@${{ secrets.PROJECT_ID }}.iam.gserviceaccount.com"
 
       - name: Set up Cloud SDK
-        uses: google-github-actions/setup-gcloud@v1
+        uses: google-github-actions/setup-gcloud@v2
 
       - name: Configure Docker
-        run: gcloud auth configure-docker
+        run: gcloud auth configure-docker europe-west3-docker.pkg.dev
 
       - name: Build and Push Docker image
         run: |
-          docker build -t gcr.io/${{ secrets.PROJECT_ID }}/store-sweeper:${{ github.sha }} .
-          docker push gcr.io/${{ secrets.PROJECT_ID }}/store-sweeper:${{ github.sha }}
+          docker build -t europe-west3-docker.pkg.dev/${{ secrets.PROJECT_ID }}/cloud-run/store-sweeper:${{ github.sha }} .
+          docker push europe-west3-docker.pkg.dev/${{ secrets.PROJECT_ID }}/cloud-run/store-sweeper:${{ github.sha }}
 
       - name: Deploy to Cloud Run
         run: |
           gcloud run deploy store-sweeper \
-            --image gcr.io/${{ secrets.PROJECT_ID }}/store-sweeper:${{ github.sha }} \
+            --image europe-west3-docker.pkg.dev/${{ secrets.PROJECT_ID }}/cloud-run/store-sweeper:${{ github.sha }} \
             --platform managed \
             --region europe-west3 \
             --project ${{ secrets.PROJECT_ID }} \