Upgrade winston

Our log library got a new major version which should be implemented.

That's exactly what this patch does. Implementing the new version of the
logging library.

Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>

lib/config/environment.js

@@ -9,6 +9,7 @@ module.exports = {
   host: process.env.CMD_HOST,
   port: toIntegerConfig(process.env.CMD_PORT),
   path: process.env.CMD_PATH,
+  loglevel: process.env.CMD_LOGLEVEL,
   urlAddPort: toBooleanConfig(process.env.CMD_URL_ADDPORT),
   useSSL: toBooleanConfig(process.env.CMD_USESSL),
   hsts: {