Adds maintenance support check

beacon/templates/app/index.stub

@@ -1,11 +1,27 @@
 <?php
+
 /**
- * October - The PHP platform that gets back to basics.
+ * October CMS - a Laravel-based platform engineered for simplicity.
  *
  * @package  october/october
  * @author   Alexey Bobkov, Samuel Georges
  */
 
+/*
+|--------------------------------------------------------------------------
+| Check If The Application Is Under Maintenance
+|--------------------------------------------------------------------------
+|
+| If the application is in maintenance / demo mode via the "down" command
+| we will load this file so that any pre-rendered content can be shown
+| instead of starting the framework, which could cause an exception.
+|
+*/
+
+if (file_exists($maintenance = __DIR__ . '/storage/framework/maintenance.php')) {
+    require $maintenance;
+}
+
 /*
 |--------------------------------------------------------------------------
 | Load deployment beacon
@@ -26,7 +42,7 @@ require __DIR__.'/bootstrap/beacon.php';
 |
 */
 
-require __DIR__.'/bootstrap/autoload.php';
+require __DIR__ . '/bootstrap/autoload.php';
 
 /*
 |--------------------------------------------------------------------------
@@ -37,7 +53,7 @@ require __DIR__.'/bootstrap/autoload.php';
 |
 */
 
-$app = require_once __DIR__.'/bootstrap/app.php';
+$app = require_once __DIR__ . '/bootstrap/app.php';
 
 /*
 |--------------------------------------------------------------------------
@@ -51,9 +67,7 @@ $app = require_once __DIR__.'/bootstrap/app.php';
 $kernel = $app->make(\Illuminate\Contracts\Http\Kernel::class);
 
 $response = $kernel->handle(
-    $request = Illuminate\Http\Request::capture()
-);
-
-$response->send();
+    $request = \Illuminate\Http\Request::capture()
+)->send();
 
 $kernel->terminate($request, $response);