Update 503.blade.php for better information display

Changelog

@@ -1,4 +1,5 @@
 2018-05-22 DariusIII
+	* Chg: Update 503.blade.php for better information display
 	* Chg: Update symfony components and psy/psych to latest versions
 2018-05-21 DariusIII
 	* Chg: Update api description template to include apikey in links

resources/views/errors/503.blade.php

@@ -5,5 +5,11 @@
 @endsection
 
 @section('content')
-    Service temporarily unavailable. Please try again later!
+    @if(!empty($exception->getMessage()))
+            {{ $exception->getMessage() }}
+    @elseif(App::isDownForMaintenance() && empty($exception->getMessage()))
+        We are currently performing scheduled maintenance. We will be back shortly.
+    @else
+        Service temporarily unavailable. Please try again later!
+    @endif
 @endsection