title: Issue Docker with Symfony
body: <p>I have installed Docker and I want to run my Symfony projects. Everything looks to be configured just fine, but I keep getting Symfony errors. On the first one, Symfony do not recognise bind and autowire services.And on the second one, I receive the following error :</p>
  
  <p>"The service "security.firewall.map.context.main" has a dependency on a non-existent service "UserBundle\Handler\LogoutSuccessHandler".</p>
  
  <p>The strange thing is that on my other computer , the same two projects are working normally with no errors (the computer is configured with MAMP). Which makes me think that the problem is in the configuration of the docker.. </p>
  
  <p>I do not know how to  fix the problem so I will really appreciate some help.</p>
  
  <p>Thank you!</p>