Add GitHub Container Registry login step

Author: ARCoder181105

.github/workflows/ci-cd.yml

@@ -268,6 +268,13 @@ jobs:
     needs: build-and-push
     if: github.event_name == 'push'
     steps:
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+    
       - name: Scan backend image (Trivy)
         uses: aquasecurity/trivy-action@master
         with: