fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/astro/dist/vite-plugin-html/index.js

@@ -0,0 +1,16 @@
+import { transform } from "./transform/index.js";
+function html() {
+  return {
+    name: "astro:html",
+    options(options) {
+      options.plugins = options.plugins?.filter((p) => p.name !== "vite:build-html");
+    },
+    async transform(source, id) {
+      if (!id.endsWith(".html")) return;
+      return await transform(source, id);
+    }
+  };
+}
+export {
+  html as default
+};