ADD lazy storybook install, normally this would be installed inaside …

…the user's repo. we don't want to have this as a production dependency

.github/workflows/self-run-prod.yml

@@ -10,6 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v1
+    - run: yarn add @storybook/react
     - uses: ./
       with: 
         appCode: ${{ secrets.CHROMATIC_APP_CODE }}