Fix logger.level

app/logger.js

@@ -1,10 +1,8 @@
 const logger = require('winston');
 
-// Set log level from environment. It may be overriden later by configuration
-logger.level = process.env.LOG_LEVEL || 'info';
-
 // Colorize console logs
 logger.configure({
+  level: process.env.LOG_LEVEL || 'info',
   transports: [
     new (logger.transports.Console)({ colorize: true }),
   ],