Update docs to newest symfony version

The new symfony structure delete web folder and change it for more standart public folder.
Now diferents env are managed with and env file

docs/examples/setup-symfony.rst

@@ -46,9 +46,8 @@ It will be ready in seven simple steps:
 2. Create a new VirtualHost directory
 3. Install Symfony
 4. Symlink webroot directory
-5. Enable Symfony prod (``app.php``)
-6. Setup DNS record
-7. Visit http://my-symfony.loc in your browser
+5. Setup DNS record
+6. Visit http://my-symfony.loc in your browser
 
 
 1. Enter the PHP container
@@ -118,7 +117,7 @@ to its expected path.
 
 .. code-block:: bash
 
-   devilbox@php-7.0.20 in /shared/httpd/my-symfony $ ln -s symfony/web/ htdocs
+   devilbox@php-7.0.20 in /shared/httpd/my-symfony $ ln -s symfony/public/ htdocs
 
 How does the directory structure look after symlinking:
 
@@ -127,7 +126,7 @@ How does the directory structure look after symlinking:
    devilbox@php-7.0.20 in /shared/httpd/my-sw $ tree -L 1
    .
    ├── symfony
-   └── htdocs -> symfony/web
+   └── htdocs -> symfony/public
 
    2 directories, 0 files
 
@@ -141,16 +140,7 @@ path and points to the frameworks entrypoint.
    * Docker Toolbox and :ref:`howto_docker_toolbox_and_the_devilbox_windows_symlinks`
 
 
-5. Enable Symfony prod (``app.php``)
-------------------------------------
-
-.. code-block:: bash
-
-   devilbox@php-7.0.20 in /shared/httpd/my-symfony $ cd symfony/web
-   devilbox@php-7.0.20 in /shared/httpd/my-symfony/symfony/web $ ln -s app.php index.php
-
-
-6. DNS record
+5. DNS record
 -------------
 
 If you **have** Auto DNS configured already, you can skip this section, because DNS entries will
@@ -171,7 +161,7 @@ host operating systems ``/etc/hosts`` file (or ``C:\Windows\System32\drivers\etc
    * :ref:`setup_auto_dns`
 
 
-7. Open your browser
+6. Open your browser
 --------------------
 
 Open your browser at http://my-symfony.loc or https://my-symfony.loc