Add provider wrapper to ssr

Author: good3n

gatsby-ssr.js

@@ -5,3 +5,7 @@
  */
 
 // You can delete this file if you're not using it
+
+import React from 'react'
+import { Provider } from './src/context/globalContext'
+export const wrapRootElement = ({ element }) => <Provider>{element}</Provider>