fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/astro/dist/actions/runtime/route.js

@@ -0,0 +1,23 @@
+import { getActionContext } from "./server.js";
+const POST = async (context) => {
+  const { action, serializeActionResult } = getActionContext(context);
+  if (action?.calledFrom !== "rpc") {
+    return new Response("Not found", { status: 404 });
+  }
+  const result = await action.handler();
+  const serialized = serializeActionResult(result);
+  if (serialized.type === "empty") {
+    return new Response(null, {
+      status: serialized.status
+    });
+  }
+  return new Response(serialized.body, {
+    status: serialized.status,
+    headers: {
+      "Content-Type": serialized.contentType
+    }
+  });
+};
+export {
+  POST
+};