Add local Docker registry: registry:2 on :5000, build-push.sh, CI auto-deploy

- docker-compose services now pull from localhost:5000 instead of building locally
- build-push.sh builds + pushes all 5 Node images to local registry
- CI workflows get build-push job: test → build → push → deploy
- Deploy becomes: docker compose pull && docker compose up -d
- Eliminates silent git pull + stale Docker cache issues

.gitea/workflows/ci-p2-drift.yml

@@ -48,3 +48,21 @@ jobs:
 
       - name: Test
         run: cd $GITHUB_WORKSPACE/products/02-iac-drift-detection/saas && npm test
+
+  build-push:
+    runs-on: ubuntu-latest
+    needs: test
+    if: github.ref == 'refs/heads/main'
+    steps:
+      - name: Checkout
+        run: git clone --depth=1 http://192.168.86.11:3005/jarvis/dd0c.git $GITHUB_WORKSPACE || true
+      - name: Build and push
+        run: |
+          cd $GITHUB_WORKSPACE/products
+          docker build -t localhost:5000/dd0c-drift:latest ./02-iac-drift-detection/saas
+          docker push localhost:5000/dd0c-drift:latest
+      - name: Deploy
+        run: |
+          cd $GITHUB_WORKSPACE/products
+          docker compose pull drift
+          docker compose up -d drift