Added the actual logic

resources/lang/en/base.php

@@ -21,6 +21,11 @@ return [
             'header' => 'Server Suspended',
             'desc' => 'This server has been suspended and cannot be accessed.',
         ],
+        'maintenance' => [
+            'header' => 'Node Under Maintenance',
+            'title' => 'Maintenance',
+            'desc' => 'This node is under maintenance, therefore your server can temporarily not be accessed.'
+        ],
     ],
     'index' => [
         'header' => 'Your Servers',

resources/themes/pterodactyl/errors/maintenance.blade.php

@@ -0,0 +1,30 @@
+{{-- Pterodactyl - Panel --}}
+{{-- Copyright (c) 2015 - 2017 Dane Everitt <dane@daneeveritt.com> --}}
+
+{{-- This software is licensed under the terms of the MIT license. --}}
+{{-- https://opensource.org/licenses/MIT --}}
+@extends('layouts.error')
+
+@section('title')
+    @lang('base.errors.maintenance.header')
+@endsection
+
+@section('content-header')
+@endsection
+
+@section('content')
+    <div class="row">
+        <div class="col-md-8 col-md-offset-2 col-sm-10 col-sm-offset-1 col-xs-12">
+            <div class="box box-danger">
+                <div class="box-body text-center">
+                    <h1 class="text-red" style="font-size: 160px !important;font-weight: 100 !important;">@lang('base.errors.maintenance.title')</h1>
+                    <p class="text-muted">@lang('base.errors.maintenance.desc')</p>
+                </div>
+                <div class="box-footer with-border">
+                    <a href="{{ URL::previous() }}"><button class="btn btn-danger">&larr; @lang('base.errors.return')</button></a>
+                    <a href="/"><button class="btn btn-default">@lang('base.errors.home')</button></a>
+                </div>
+            </div>
+        </div>
+    </div>
+@endsection