Update pythonapp.yml

.github/workflows/pythonapp.yml

@@ -44,6 +44,14 @@ jobs:
     - name: Run
       run: |
         kedro run
+        
+    - name: Use Node.js 13.x
+      uses: actions/setup-node@v1
+      with:
+        node-version: 13.x
+        registry-url: https://npm.pkg.github.com/
+        scope: '@ownername'
+
     - name: install npm
       run: |
         npm i -g gatsby-cli