Add prod env.

lib/config.dart

@@ -9,6 +9,7 @@ class Config {
   static const HOSTS = [
     'https://demo1.vereign.com',
     'https://demo2.vereign.com',
+    'https://app.vereign.com',
     'https://rosengeorgiev.dev.vereign.com',
     'https://borisdimitrov.dev.vereign.com',
     'https://integration.vereign.com',