Merge pull request #116 from pelias/runtime-error-reporting#114

Resolve #114: report runtime errors.

middleware/500.js

@@ -1,9 +1,12 @@
+var logger = require( '../src/logger' );
 
 // handle application errors
 function middleware(err, req, res, next) {
+  logger.error( 'Error:', err );
+  logger.error( 'Stack trace:', err.trace );
   res.header('Cache-Control','no-cache');
   if( res.statusCode < 400 ){ res.status(500); }
-  res.json({ error: err });
+  res.json({ error: 'internal server error' });
 }
 
 module.exports = middleware;