replace python django backend with nodejs backend

backend_old/ai/apps.py

@@ -0,0 +1,11 @@
+from django.apps import AppConfig
+
+
+class AisConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'ai'
+
+    def ready(self):
+        # noinspection PyUnresolvedReferences
+        from . import events  # register events
+        pass