title: How do I "patch" my website without the fear of breaking something?
body: <p>I'm developing a website, and im doing it on its final destination domain, not on localhost, and its almost finished. </p>
  
  <p>Now I've come to the point where I'm beginning to get worried about what I do when users start using the site and some problems occur, or maybe I want to add a features to the site. </p>
  
  <p>Is there any best practices which will allow be to minimize risks ruinin website and customer UX during updates, how to do it correctly?</p>