docs(readme): udpate readme with instructions on firebase hosting

readme.md

@@ -45,6 +45,22 @@ npm run build
 A production build includes everything needed for your project to be a PWA right out of the box. This includes both a Web Manifest (src/manifest.json) and a Service Worker (www/sw.js).
 
 
+## Hosting
+
+We currently recommend [Firebase Hosting](https://firebase.google.com/docs/hosting/) as the best option for hosting PWAs built with the Ionic PWA Toolkit. Firebase Hosting gives you HTTPS and HTTP2 out of the box which are both crucial to hosting PWAs.
+
+### H2 Push
+
+To ensure the fastest possible load time for your PWA, we recommend setting up H2 push on Firebase. [Here is an example](https://github.com/ionic-team/ionic-stencil-hn-app/blob/master/firebase.json#L19-L25) of what this looks like in your `firebase.json` file. Lets go over the steps of how to setup H2 push properly for your Ionic PWA:
+
+- Do a production build of your PWA with `npm run build`
+- Serve your WWW folder locally using a local http server and open it in Chrome. https://www.npmjs.com/package/http-server works pretty well for this. If using the http-server package you can serve your www folder by running `http-server www`.
+- Open Chrome Dev Tools on your PWA and open the [network tab of your chrome dev tools](https://developers.google.com/web/tools/chrome-devtools/network-performance/reference). Reload the page and you should see all of your JS files show up in the network tab. Besides the `sw.js` file, these are the files you want to H2 push.
+- You can then put these files in your push header setup by following this syntax https://github.com/ionic-team/ionic-stencil-hn-app/blob/master/firebase.json#L23.
+
+** Note: In an upcoming release we will be automatically generating this H2 push config for you meaning you will not have to do any of the above anymore **
+
+
 ## Service Workers
 
 For info on how Service Workers work in Stencil check out our [Service Worker docs](https://stenciljs.com/docs/service-workers).