Add support for reading commonly changed config from env vars

Also added App.default_locale.

Refs #224

config/app.default.php

@@ -9,7 +9,7 @@
      * Development Mode:
      * true: Errors and warnings shown.
      */
-    'debug' => true,
+    'debug' => env('DEBUG', true),
 
     /**
      * Configure basic information about the application.
@@ -37,7 +37,8 @@
      */
     'App' => [
         'namespace' => 'App',
-        'encoding' => 'UTF-8',
+        'encoding' => env('APP_ENCODING', 'UTF-8'),
+        'default_locale' => env('APP_DEFAULT_LOCALE', 'en_US'),
         'base' => false,
         'dir' => 'src',
         'webroot' => 'webroot',
@@ -62,7 +63,7 @@
      *   You should treat it as extremely sensitive data.
      */
     'Security' => [
-        'salt' => '__SALT__',
+        'salt' => env('SECURITY_SALT', '__SALT__'),
     ],
 
     /**
@@ -84,6 +85,7 @@
         'default' => [
             'className' => 'File',
             'path' => CACHE,
+            'url' => env('CACHE_DEFAULT_URL', null),
         ],
 
         /**
@@ -97,6 +99,7 @@
             'path' => CACHE . 'persistent/',
             'serialize' => true,
             'duration' => '+2 minutes',
+            'url' => env('CACHE_CAKECORE_URL', null),
         ],
 
         /**
@@ -111,6 +114,7 @@
             'path' => CACHE . 'models/',
             'serialize' => true,
             'duration' => '+2 minutes',
+            'url' => env('CACHE_CAKEMODEL_URL', null),
         ],
     ],
 
@@ -178,6 +182,7 @@
             'password' => 'secret',
             'client' => null,
             'tls' => null,
+            'url' => env('EMAILTRANSPORT_DEFAULT_URL', null),
         ],
     ],
 
@@ -244,6 +249,8 @@
              * which is the recommended value in production environments
              */
             //'init' => ['SET GLOBAL innodb_stats_on_metadata = 0'],
+
+            'url' => env('DATABASE_URL', null),
         ],
 
         /**
@@ -264,6 +271,7 @@
             'quoteIdentifiers' => false,
             'log' => false,
             //'init' => ['SET GLOBAL innodb_stats_on_metadata = 0'],
+            'url' => env('TEST_DATABASE_URL', null),
         ],
     ],
 
@@ -276,12 +284,14 @@
             'path' => LOGS,
             'file' => 'debug',
             'levels' => ['notice', 'info', 'debug'],
+            'url' => env('LOG_DEBUG_URL', null),
         ],
         'error' => [
             'className' => 'Cake\Log\Engine\FileLog',
             'path' => LOGS,
             'file' => 'error',
             'levels' => ['warning', 'error', 'critical', 'alert', 'emergency'],
+            'url' => env('LOG_ERROR_URL', null),
         ],
     ],