fix: change automated test command for CD workflow

.github/workflows/A2_Part2.yml

@@ -30,15 +30,18 @@ jobs:
         docker rm frontend || true
         docker stop backend || true
         docker rm backend || true
-        docker stop redis || true
-        docker rm redis || true
         docker run -d --name frontend -p 80:3000 ${{ secrets.DOCKERHUB_USERNAME }}/cscc01-linkup_frontend:latest
         docker run -d --name backend -p 5000:5000 ${{ secrets.DOCKERHUB_USERNAME }}/cscc01-linkup_backend:latest
         
     - name: Run Automated Tests for Backend
       run: |
-        docker exec backend npm test
+          ls
+          cd backend
+          npm install
+          npm test
 
     - name: Run Automated Tests for Frontend
       run: |
-        docker exec frontend npm test
+            cd frontend
+            npm install
+            npm test