Upgrade packages

src/pages/[...].js

@@ -0,0 +1,16 @@
+import React from "react"
+
+import App from "components/App"
+import Layout from "components/Layout"
+
+/* similar to create-react-app, the App.js is like the 
+   entrypoint to the protected/client only content,
+   Context providers are moved to gatsby-browser.js
+   to wrap the root element with necessary providers
+   and context */
+const app = () => (
+  <Layout>
+    <App />
+  </Layout>
+)
+export default app;