Better banner

webpack/plugins/banner.ts

@@ -1,9 +1,10 @@
+import * as os from 'os';
 import * as webpack from 'webpack';
 
 export default version => new webpack.BannerPlugin({
 	banner:
 		`Misskey v${version} | MIT Licensed, (c) syuilo 2014-2017\n` +
 		'https://github.com/syuilo/misskey\n' +
-		`built at ${new Date()}\n` +
+		`built by ${os.hostname()} at ${new Date()}\n` +
 		'hash:[hash], chunkhash:[chunkhash]'
 });