Set environment variables for test in gh action workflow

Author: khkim6040

.github/workflows/github-action.yaml

@@ -30,6 +30,9 @@ jobs:
   test:
     name: Run tests
     runs-on: ubuntu-latest
+    env: 
+      NODE_ENV: test
+      JWT_SECRET_KEY: test
     steps:
       - name: Checkout
         uses: actions/checkout@v4