re-enable Tailwind compile with postcss

src/App.svelte

@@ -1,5 +1,5 @@
 <script>
-  // import TailwindStyles from "./TailwindStyles.svelte";
+  import "./TailwindStyles.svelte";
   import "toastify-js/src/toastify.css";
   import { Route, router } from "tinro";
   router.subscribe((routeInfo) => {