title: Display symfony website to be checked by clients before going to production + versioning
body: <p>I know how to deploy the website on a specific domain name, but here I need to give online access to a project, which domain name is already used by the current version of the web site.</p>
  
  <p>The goal is that the project will replace the website after being approved, so I need an online place to demonstrate it, other than the dev computer, for example: <code>https://example.com/project</code> so that both example.com and project have their own rules, etc.</p>
  
  <p>It seems to me that's impossible this way, so I am wondering what are the best practices to do so?</p>
  
  <p>Linked to this process, what are the best practices to give access for approval to updated versions, i.e. a modification is requested and done but displayed with a specific url: <code>https://example.org/v1.0/xxx</code> to test navigation, look and feel, etc. before being deployed on the production server, when approved.
  Thanks</p>