doc: fix whitespace and trailing comma. (#1778)

* doc: fix whitespace and trailing comma.

* docs: add require statement

* remove whitespace

README.md

@@ -59,17 +59,17 @@ const logger = winston.createLogger({
     // - Write all logs with level `info` and below to `combined.log`
     //
     new winston.transports.File({ filename: 'error.log', level: 'error' }),
-    new winston.transports.File({ filename: 'combined.log' })
-  ]
+    new winston.transports.File({ filename: 'combined.log' }),
+  ],
 });
 
 //
 // If we're not in production then log to the `console` with the format:
 // `${info.level}: ${info.message} JSON.stringify({ ...rest }) `
-// 
+//
 if (process.env.NODE_ENV !== 'production') {
   logger.add(new winston.transports.Console({
-    format: winston.format.simple()
+    format: winston.format.simple(),
   }));
 }
 ```