chore: Clean up unused files, imports, and work on getting end-to-end tests and unit tests running (#2272)

platform/viewer/.webpack/webpack.pwa.js

@@ -1,7 +1,7 @@
 // https://developers.google.com/web/tools/workbox/guides/codelabs/webpack
 // ~~ WebPack
 const path = require('path');
-const merge = require('webpack-merge');
+const { merge } = require('webpack-merge');
 const webpack = require('webpack');
 const webpackBase = require('./../../../.webpack/webpack.base.js');
 // ~~ Plugins