Add FAQ page in documentation
:maxdepth: 2
:caption: User documentation
+ user/faq
user/installation
user/migration
user/create_account
--- /dev/null
+Frequently Asked Questions
+==========================
+
+During the installation, I've got this error ``Error Output: sh: 1: @post-cmd: not found``
+------------------------------------------------------------------------------------------
+
+It seems you have a problem with your ``composer`` installation. Try to uninstall and reinstall it.
+
+`Read the documentation about composer to know how to install it
+<https://getcomposer.org/doc/00-intro.md>`__.
:maxdepth: 2
:caption: Documentation utilisateur
+ user/faq
user/installation
user/migration
user/create_account
--- /dev/null
+Foire Aux Questions
+===================
+
+Durant l'installation, je rencontre cette erreur ``Error Output: sh: 1: @post-cmd: not found``
+----------------------------------------------------------------------------------------------
+
+Il semblerait que vous ayiez un problème avec votre installation de ``composer``. Essayez de le désinstaller puis de le réinstaller.
+
+`Vous pouvez lire la documentation de composer pour savoir comment l'installer
+<https://getcomposer.org/doc/00-intro.md>`__.