[feat] trees & [fix] deploy & [fix] some bugs

backend/project/api/tree/urls.py

@@ -0,0 +1,13 @@
+from django.urls import include, path
+from rest_framework.routers import DefaultRouter
+
+from api.tree.views import TreeViewSet
+
+app_name = "tree"
+
+router = DefaultRouter()
+router.register("", TreeViewSet)
+
+urlpatterns = [
+    path("", include(router.urls)),
+]