Update deployment.rst

Updated file recommended for use when using .env files to manage environment variables for the application.

Author: jdevinemt

deployment.rst

@@ -134,14 +134,13 @@ B) Configure your Environment Variables
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Most Symfony applications read their configuration from environment variables.
-While developing locally, you'll usually store these in ``.env`` and ``.env.local``
-(for local overrides). On production, you have two options:
+While developing locally, you'll usually store these in `.env files <https://symfony.com/doc/current/configuration.html#configuring-environment-variables-in-env-files>`_. On production, you have two options:
 
 1. Create "real" environment variables. How you set environment variables, depends
    on your setup: they can be set at the command line, in your Nginx configuration,
    or via other methods provided by your hosting service;
 
-2. Or, create a ``.env.local`` file like your local development.
+2. Or, create a ``.env.prod.local`` file containing values specific to your production environment.
 
 There is no significant advantage to either of the two options: use whatever is
 most natural in your hosting environment.