fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/astro/dist/prerender/metadata.js

@@ -0,0 +1,18 @@
+import { viteID } from "../core/util.js";
+function getPrerenderStatus({
+  filePath,
+  loader
+}) {
+  const fileID = viteID(filePath);
+  const moduleInfo = loader.getModuleInfo(fileID);
+  if (!moduleInfo) return;
+  const prerenderStatus = getPrerenderMetadata(moduleInfo);
+  return prerenderStatus;
+}
+function getPrerenderMetadata(moduleInfo) {
+  return moduleInfo?.meta?.astro?.pageOptions?.prerender;
+}
+export {
+  getPrerenderMetadata,
+  getPrerenderStatus
+};