Implement caches maps

The idea is serve one cache for any navigation request, /albums for example. Same, if cache is empty, any navigation request should populate given cache.

Probably not any. Maybe something specified in map like this:

{
  '/albums': '/',
  '/gallery': '/'
}
// or
{
  '/*': '/shell.html'
}

Here is the use case number one: https://github.com/NekR/offline-plugin/issues/27 Second use case it to serve server-rendered content on network requests, but in ServiceWorker, cache the AppShell.

[NekR]

Is everyone here okay with this design for cache maps:

https://github.com/NekR/offline-plugin/issues/117

Here was a code example, but I actually placed it to separate issue for clarity

/cc @MoOx @developit @KyleAMathews

[NekR]

@nodkz so essentially it’s just runtime-rewriter-function, right? Yeah, good idea 👍