Update node.js.yml

Author: inotbaggi

.github/workflows/node.js.yml

@@ -5,6 +5,9 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./frontend
     steps:
     - name: Checkout code
       uses: actions/checkout@v2