add env variables to deployment

app/Http/Livewire/Project/Application/General.php

@@ -33,6 +33,9 @@ class General extends Component
         'application.git_repository' => 'required',
         'application.git_branch' => 'required',
         'application.git_commit_sha' => 'nullable',
+        'application.install_command' => 'nullable',
+        'application.build_command' => 'nullable',
+        'application.start_command' => 'nullable',
         'application.build_pack' => 'required',
         'application.static_image' => 'required',
         'application.base_directory' => 'required',