Revert "Tidy up Service Worker, only run Workbox in production"

This reverts commit c47532fe

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/vector/index.ts

@@ -28,6 +28,11 @@ require('highlight.js/styles/github.css');
 import {parseQsFromFragment} from "./url_utils";
 import './modernizr';
 
+// load service worker if available on this platform
+if ('serviceWorker' in navigator) {
+    navigator.serviceWorker.register('service-worker.js');
+}
+
 async function settled(...promises: Array<Promise<any>>) {
     for (const prom of promises) {
         try {