:building_construction: Remove service-worker hack

[resir014]

Motivation

We used some kinda of hack to get the service worker URL to register it, but we can actually do it with serviceworker-webpack-plugin to be able to load up our custom service worker without having to rewrite everything in Workbox.

So we can keep our existing service worker, but to include it, we can simply do this:

- import workerPath from 'bemuse/hacks/service-worker-url/index.loader.js!serviceworker-loader!./service-worker.js'
+ import serviceWorkerRuntime from 'serviceworker-webpack-plugin/lib/runtime'

Things to note

• Since we're rebuilding our service worker, need to figure out a way to 'safely' unregister the old service worker before installing the new one.
• I had to update the webpack config so that the publicPath is set at the / directory. This means I needed to rewrite some configs in webpack to reflect that change (specifically with file output.).
• No TS typings included for the serviceworker-webpack-plugin runtime, so I had to include the typings myself.

[codecov-io]

Codecov Report

Merging #525 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #525   +/-   ##
=======================================
  Coverage   81.38%   81.38%           
=======================================
  Files         153      153           
  Lines        4619     4619           
  Branches       68       68           
=======================================
  Hits         3759     3759           
  Misses        842      842           
  Partials       18       18

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 71b9091...56bc60c. Read the comment docs.

[resir014]

We can probably try and follow what create-react-app did to register/unregister our service worker, here: https://github.com/facebook/create-react-app/blob/master/packages/react-scripts/template-typescript/src/serviceWorker.ts

[resir014]

@dtinth Ah yeah! We can give this a try, then at the release after this we can experiment with Workbox more. I tried fiddling with Workbox at one point but I didn't go far. 😅

I'll get this merged later today.