add prod workflow back again

.github/workflows/deploy_vercel_prod.yml

@@ -0,0 +1,23 @@
+name: Deploy studio app to production on vercel
+on:
+  push:
+    branches:
+      - studio
+    paths:
+      - 'studio/**'
+jobs:
+  deploy:
+    runs-on: ubuntu-18.04
+    timeout-minutes: 10
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: amondnet/vercel-action@v19
+        with:
+          vercel-token: ${{ secrets.VERCEL_TOKEN }} # Required
+          github-comment: false
+          vercel-args: '--prod -A .vercel/production.json'
+          vercel-org-id: team_E6KJ1W561hMTjon1QSwOh0WO #Required
+          vercel-project-id: Qmd7Mw8yFW8SbtvTWFV9uyRzw9P1rJLmgtHjSezywhtYec #Required
+          working-directory: ./studio #Your Working Directory, Optional
+          vercel-project-name: app