Merge pull request #424 from UnitedMarsupials/master

fix: add signal-handling to allow proper log-rotation.

src/lib/logger.js

@@ -93,6 +93,10 @@ function setup(logs) {
 		},
 	});
 
+       process.on('SIGUSR2', function() {
+               Logger.reopenFileStreams();
+       });
+
 	module.exports.logger = logger;
 }
 

wiki/logger.md

@@ -10,6 +10,8 @@ logs:
   - {type: file, path: verdaccio.log, level: info}
 ```
 
+Use `SIGUSR2` to notify the application, the log-file was rotated and it needs to reopen it.
+
 ### Configuration
 
 Property | Type | Required | Example | Support | Description