Update README.md

README.md

@@ -151,6 +151,7 @@ new OpenApiValidator({
     // 6. Create an Express error handler
     app.use((err, req, res, next) => {
       // 7. Customize errors
+      console.error(err); // dump error to console for debug
       res.status(err.status || 500).json({
         message: err.message,
         errors: err.errors,