Update node.js.yml

add an action to run test job after build job and another action to download and use artifact produced by build job

.github/workflows/node.js.yml

@@ -19,7 +19,7 @@ jobs:
           path: public/
 
   test:
-
+    needs: build
     runs-on: ubuntu-latest
 
     strategy:
@@ -29,6 +29,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+    - uses: actions/download-artifact@main
+      with: 
+        name: webpack artifacts
+        path: public    
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v1
       with: