add the other pieces for the previous commit

src/main.web.ts

@@ -1,5 +1,19 @@
+import { initBackend } from 'absurd-sql/dist/indexeddb-main-thread';
 import { initializeApp } from "./main.common";
 import "./registerServiceWorker"; // Web PWA support
 
 const app = initializeApp();
+
+function sqlInit() {
+  // see https://github.com/jlongster/absurd-sql
+  let worker = new Worker(new URL('./registerSQLWorker.js', import.meta.url), {
+    type: 'module'
+  });
+  // This is only required because Safari doesn't support nested
+  // workers. This installs a handler that will proxy creating web
+  // workers through the main thread
+  initBackend(worker);
+}
+sqlInit();
+
 app.mount("#app");