Basic support for installation process

app/Http/Controllers/Api/Client/Servers/WebsocketController.php

@@ -67,7 +67,7 @@ class WebsocketController extends ClientApiController
                 'connect',
                 'send-command',
                 'send-power',
-            ], $request->user()->root_admin ? ['receive-errors'] : []))
+            ], $request->user()->root_admin ? ['receive-errors', 'receive-install'] : []))
             ->getToken($signer, new Key($server->node->daemonSecret));
 
         $socket = str_replace(['https://', 'http://'], ['wss://', 'ws://'], $server->node->getConnectionAddress());

app/Http/Controllers/Api/Remote/Servers/ServerInstallController.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace Pterodactyl\Http\Controllers\Api\Remote\Servers;
+
+use Illuminate\Http\Request;
+use Illuminate\Http\JsonResponse;
+use Pterodactyl\Http\Controllers\Controller;
+use Pterodactyl\Repositories\Eloquent\ServerRepository;
+
+class ServerInstallController extends Controller
+{
+    /**
+     * @var \Pterodactyl\Repositories\Eloquent\ServerRepository
+     */
+    private $repository;
+
+    /**
+     * ServerInstallController constructor.
+     *
+     * @param \Pterodactyl\Repositories\Eloquent\ServerRepository $repository
+     */
+    public function __construct(ServerRepository $repository)
+    {
+        $this->repository = $repository;
+    }
+
+    /**
+     * Returns installation information for a server.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @param string $uuid
+     * @return \Illuminate\Http\JsonResponse
+     *
+     * @throws \Pterodactyl\Exceptions\Repository\RecordNotFoundException
+     */
+    public function __invoke(Request $request, string $uuid)
+    {
+        $server = $this->repository->getByUuid($uuid);
+        $egg = $server->egg;
+
+        return JsonResponse::create([
+            'container_image' => $egg->copy_script_container,
+            'entrypoint' => $egg->copy_script_entry,
+            'script' => $egg->copy_script_install,
+        ]);
+    }
+}