Make mediasoup use all available threads on platform

server/mediasoup.js

@@ -8,7 +8,7 @@ const config = require('./config');
 // mediasoup server.
 const mediaServer = mediasoup.Server(
 	{
-		numWorkers       : 1,
+		numWorkers       : null,
 		logLevel         : config.mediasoup.logLevel,
 		logTags          : config.mediasoup.logTags,
 		rtcIPv4          : config.mediasoup.rtcIPv4,
@@ -318,4 +318,4 @@ function stdinError(msg)
 	console.error(colors.red.bold('ERROR: ') + colors.red(msg));
 }
 
-module.exports = mediaServer;
+module.exports = mediaServer;