title: Best practice to deploy release on production
body: <p>We have a production site with more than 350 running instances, so making the site down even for a short time is a big deal.<br> My question: 
  After pushing our code to production, if there is any update on composer we have to update it, during this period the site will be down. So what is the best practice to update composer on production without making the site down while updating? </p>