feat: Convert error handler ts file to js file

packages/backend/src/helpers/error-handler.js

@@ -0,0 +1,13 @@
+import logger from './logger';
+
+// Do not remove `next` argument as the function signature will not fit for an error handler middleware
+const errorHandler = (err, req, res, next) => {
+  if (err.message === 'Not Found') {
+    res.status(404).end();
+  } else {
+    logger.error(err.message + '\n' + err.stack);
+    res.status(err.statusCode || 500).send(err.message);
+  }
+};
+
+export default errorHandler;