discussion - add demo link into document

[davidnguyen11]

Hi @jeffposnick,

I have made a demo about progressive web app using this repository and I would like to share. Does PR welcome?

Here is a repo: https://github.com/nndung179/create-react-pwa-demo

[edouardbrasier]

Great Demo Dung.
I was also able to develop a progressive web app react, redux mortgage calculator thanks to create-react-pwa.
https://github.com/edouardbrasier/React-Redux-Mortgage-Calculator