return res.statusCode on "Server failed to respond." (#938)

* return res.statusCode on "Server failed to respond."

* apply micro-optimization, pull this out into a constant above the try/catch

* hardcode as a 500

* Create pretty-dodos-end.md

---------

Co-authored-by: conico974 <[email protected]>

Author: jonkwheeler

.changeset/pretty-dodos-end.md

@@ -0,0 +1,5 @@
+---
+"@opennextjs/aws": patch
+---
+
+set the correct 500 status code on internal server error

packages/open-next/src/core/requestHandler.ts

@@ -345,6 +345,7 @@ async function tryRenderError(
     await requestHandler(requestMetadata)(_req, res);
   } catch (e) {
     error("NextJS request failed.", e);
+    res.statusCode = 500;
     res.setHeader("Content-Type", "application/json");
     res.end(
       JSON.stringify(