Implement Service Worker caching

[jaredpalmer]

https://reason.nyc uses this via razzle.config.js. It loads a google font, but even so, here are lighthouse scores:

[Grsmto]

Hey Jared,
What is blocking this issue to be done? Can we help?
Thanks.

[lukePeavey]

I was wondering about this too.

[kanzelm3]

I am also wondering about this, would love to get this implemented.

[Metnew]

OfflinePlugin addition to client's webpack config could resolve this issue.
In the case SW is included by default, it could become a problem to exclude SW generation from webpack config without excluding plugins inside razzle.config.js.
Will SW be an optional thing?

[stale]

Hola! So here's the deal, between open source and my day job and life and what not, I have a lot to manage, so I use a GitHub bot to automate a few things here and there. This particular GitHub bot is going to mark this as stale because it has not had recent activity for a while. It will be closed if no further activity occurs in a few days. Do not take this personally--seriously--this is a completely automated action. If this is a mistake, just make a comment, DM me, send a carrier pidgeon, or a smoke signal.

[stale]

ProBot automatically closed this due to inactivity. Holler if this is a mistake, and we'll re-open it.