Add new env vars to the sample/dev env files.

azuracast.dev.env

@@ -2,9 +2,9 @@
 # AzuraCast Customization
 #
 
-# The application environment.
-# Valid options: production or development
 APPLICATION_ENV=development
+PREFER_RELEASE_BUILDS=false
+COMPOSER_PLUGIN_MODE=false
 
 # Developer options.
 # Populate these!

azuracast.sample.env

@@ -3,9 +3,20 @@
 #
 
 # The application environment.
-# Valid options: production or development
+# Valid options: production, development, testing
 APPLICATION_ENV=production
 
+# Prefer release versions over always-updating "rolling" releases.
+# Valid options: true, false
+PREFER_RELEASE_BUILDS=false
+
+# Enable the composer "merge" functionality to combine the main application's
+# composer.json file with any plugins' composer files.
+# This can have performance implications, so you should only use it if
+# you use one or more plugins with their own Composer dependencies.
+# Valid options: true, false
+COMPOSER_PLUGIN_MODE=false
+
 #
 # Database Configuration
 # --