Make with-firebase-hosting private

Author: rvsia

packages/react-renderer-demo/package.json

@@ -5,6 +5,7 @@
     "engines": {
         "node": "10"
     },
+    "private": true,
     "scripts": {
         "dev": "next \"src/app/\"",
         "preserve": "npm run build-public && npm run build-funcs && npm run build-app && npm run copy-deps && npm run install-deps",