fix: system test github action

.github/workflows/backend-system-tests.yml

@@ -6,16 +6,17 @@ on:
       - main
 
 jobs:
-  integration-tests:
+  system-tests:
     runs-on: ubuntu-latest
-    container: node:18-alpine
+    container: node:18
     steps:
       - uses: actions/checkout@v2
-        with:
-          path: backend
       - name: Install Dependencies
+        working-directory: ./backend
         run: npm install
       - name: Create .env file
+        working-directory: ./backend
         run: mv .env.example .env
       - name: Run Server and Test with Newman
+        working-directory: ./backend
         run: npm run test:system