PWA docs improvements (#244)
PWA docs improvements (#244)

* some clarification on starter kit vs wrapper

* extra information on lighthouse

* rephrased

* Some initial information about PWA's

For people who don't know much about it.
I plan to add more information how to effectively change the service worker to your app's needs and some examples on how to best use things like indexedDb etc.

rstoenescu/quasar-site,rstoenescu/quasar-site,quasarframework/quasar-framework.org,quasarframework/quasar-framework.org,quasarframework/quasar-framework.org,rstoenescu/quasar-site