add status code logging to all the places

middleware/404.js

@@ -1,7 +1,9 @@
+const logger = require('pelias-logger').get('api');
 
 // handle not found errors
 function middleware(req, res) {
   res.header('Cache-Control','public');
+  logger.info('status code', 404);
   res.status(404).json({ error: 'not found: invalid path' });
 }
 

middleware/500.js

@@ -7,6 +7,8 @@ function middleware(err, req, res, next) {
   var error = (err && err.message) ? err.message : err;
 
   if( res.statusCode < 400 ){ res.status(500); }
+  logger.info('status code', res.statusCode);
+
   res.json({ error: typeof error === 'string' ? error : 'internal server error' });
 }
 

middleware/sendJSON.js

@@ -1,6 +1,7 @@
 var check = require('check-types'),
     es = require('elasticsearch'),
     exceptions = require('elasticsearch-exceptions/lib/exceptions/SupportedExceptions');
+const logger = require('pelias-logger').get('api');
 
 // create a list of regular expressions to match against.
 // note: list created when the server starts up; for performance reasons.
@@ -60,6 +61,8 @@ function sendJSONResponse(req, res, next) {
     });
   }
 
+  logger.info('status code', statusCode);
+
   // respond
   return res.status(statusCode).json(res.body);
 }