title: Can to set expire time for a redis pub/sub message
body: <p>i want to set expire time to redis pub/sub messages while being published. How do i do it in nodeJS?</p>
  
  <pre><code>var redis = require('redis');
  
  redis.createClient().publish('some channel', 'some message', function(err) {  
    if (err) {
      console.error('error publishing:', err);
    }
  });
  </code></pre>
  
  <p>The code to pusblish a message is above. what all changes do i have to do to set expiry time for the published message. </p>