Service worker routing

[ctulocal1]

Create a service worker that builds on the JSON-HTML plus shell build script to create a local routing engine. This will supplant a cache-first strategy by combining:

1. App shell template
2. Settings that choose:
   • Forms to contact Organizer/Field Rep
   • Feeds based on choices
   • Anything else that I think of
3. Hydrated contract pages or another page resulting from forms or other options available.