Added kill command and PM2 ecosystem file with restart delay.

ecosystem.config.js

@@ -0,0 +1,4 @@
+module.exports = {
+	script: 'src/app.js',
+	restart_delay: 5000,
+};

src/app.js

@@ -145,6 +145,11 @@ function onMessage(message, bot, games) {
 	const user = bot.users[message.userId] || message.user;
 	const room = bot.rooms[message.roomId];
 
+	if (command === 'kill') {
+		process.exit();
+		return;
+	}
+
 	if (command) {
 		const args = body.split(/\s+/).slice(1);
 		const game = games[command];