loading: keep 'serveIndex' query arg on all sw.js loads, not just in embed.js (#242)

fixes embed 'purge cache + reload'
bump to 1.8.12

src/appmain.ts

@@ -447,6 +447,7 @@ export class ReplayWebApp extends LitElement {
     if (this.useRuffle) {
       qp.set("injectScripts", "ruffle/ruffle.js");
     }
+    qp.set("serveIndex", "1");
     query = qp.toString();
     if (query.length) {
       name += "?" + query;

src/sw.js

@@ -0,0 +1,29 @@
+import INDEX_HTML from "../index.html";
+
+import { SWReplay } from "@webrecorder/wabac/src/swmain";
+
+import { WorkerLoader } from "@webrecorder/wabac/src/loaders";
+
+if (self.registration) {
+  const staticData = new Map();
+
+  const prefix = self.registration.scope;
+
+  staticData.set(prefix, { type: "text/html", content: INDEX_HTML });
+  staticData.set(prefix + "index.html", {
+    type: "text/html",
+    content: INDEX_HTML,
+  });
+
+  const sp = new URLSearchParams(self.location.search);
+
+  const defaultConfig = {};
+
+  if (sp.get("ruffle") == "1") {
+    defaultConfig.injectScripts = ["ruffle/ruffle.js"];
+  }
+
+  self.sw = new SWReplay({ staticData, defaultConfig });
+} else {
+  new WorkerLoader(self);
+}