added fully working astro example

examples/astro/astro.config.mjs

@@ -0,0 +1,10 @@
+// @ts-check
+import { defineConfig } from "astro/config";
+
+import react from "@astrojs/react";
+
+// https://astro.build/config
+export default defineConfig({
+   output: "hybrid",
+   integrations: [react()]
+});