Added logger.

app.js

+const logger = require('./logger')
+
 var http = require('http'),
     path = require('path'),
     methods = require('methods'),
@@ -14,6 +16,16 @@ var isProduction = process.env.NODE_ENV === 'production';
 // Create global app object
 var app = express();
 
+app.use((req, res, next) => {
+  logger.info(req.body)
+  let origSend = res.send
+  res.send = function(data)  {
+      logger.info(data)
+      origSend.apply(res, arguments)
+  }
+  next()
+})
+
 app.use(cors());
 
 // Normal express config defaults
@@ -57,7 +69,7 @@ app.use(function(req, res, next) {
 // will print stacktrace
 if (!isProduction) {
   app.use(function(err, req, res, next) {
-    console.log(err.stack);
+    logger.info(err.stack);
 
     res.status(err.status || 500);
 
@@ -80,5 +92,5 @@ app.use(function(err, req, res, next) {
 
 // finally, let's start our server...
 var server = app.listen( process.env.PORT || 3000, function(){
-  console.log('Listening on port ' + server.address().port);
+  logger.info('Listening on port ' + server.address().port);
 });

logger.js

+const {​​​​​ createLogger, transports, format }​​​​​ = require('winston')
+constlogger = createLogger({​​​​​
+transports: [
+newtransports.File({​​​​​
+filename:'error.log',
+level:'error',
+format:format.combine(format.timestamp(), format.json())
+        }​​​​​),
+newtransports.File({​​​​​
+filename:'info.log',
+level:'info',
+format:format.combine(format.timestamp(), format.json())
+        }​​​​​),
+newtransports.Console({​​​​​
+level:'info',
+format:format.combine(format.timestamp(), format.colorize(), format.json())
+        }​​​​​)
+    ]
+}​​​​​)
+module.exports = logger
\ No newline at end of file