Don't require an environment variable to be present if none are required anyways, closes pterodactyl#1007

Author: DaneEveritt

CHANGELOG.md

@@ -7,6 +7,7 @@ This project follows [Semantic Versioning](http://semver.org) guidelines.
 ### Fixed
 * Fixes a bug when reinstalling a server that would not mark the server as installing, resulting in some UI issues.
 * Handle 404 errors from missing models in the application API bindings correctly.
+* Fix validation error returned when no environment variables are passed, even if there are no variables required.
 
 ### Added
 * Adds back client API for sending commands or power toggles to a server though the Panel API: `/api/client/servers/<identifier>`

app/Http/Requests/Api/Application/Servers/StoreServerRequest.php

@@ -39,7 +39,7 @@ public function rules(): array
             'pack' => $rules['pack_id'],
             'docker_image' => $rules['image'],
             'startup' => $rules['startup'],
-            'environment' => 'required|array',
+            'environment' => 'present|array',
             'skip_scripts' => 'sometimes|boolean',
 
             // Resource limitations