Update manage.py

Author: lavskillup

server/manage.py

@@ -9,12 +9,12 @@ def main():
     os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'djangobackend.settings')
     try:
         from django.core.management import execute_from_command_line
-    except ImportError:
+    except ImportError as exc:
         raise ImportError(
             "Couldn't import Django. Are you sure it's installed and "
             "available on your PYTHONPATH environment variable? Did you "
             "forget to activate a virtual environment?"
-        )
+        ) from exc
     execute_from_command_line(sys.argv)