Support naming docker images on eggs; closes #4052

Bumps PTDL_v1 export images to PTDL_v2, updates the Minecraft specific eggs to use named images.

app/Http/Requests/Api/Client/Servers/Settings/SetDockerImageRequest.php

@@ -27,7 +27,7 @@ class SetDockerImageRequest extends ClientApiRequest implements ClientPermission
         Assert::isInstanceOf($server, Server::class);
 
         return [
-            'docker_image' => ['required', 'string', Rule::in($server->egg->docker_images)],
+            'docker_image' => ['required', 'string', Rule::in(array_values($server->egg->docker_images))],
         ];
     }
 }