suppress winston on polling

lib/options.js

@@ -1,6 +1,8 @@
 const fs = require('fs')
 const path = require('path')
 const os = require('os')
+const _ = require('lodash/fp')
+const argv = require('minimist')(process.argv.slice(2))
 
 let serverConfig
 
@@ -17,4 +19,7 @@ try {
   }
 }
 
-module.exports = serverConfig
+const defaults = {logLevel: 'info'}
+const commandLine = {logLevel: argv.logLevel}
+
+module.exports = _.mergeAll([defaults, serverConfig, commandLine])