I try to execute django server in colab but don’t work

I write in colab:

!pip install django
!django-admin startproject portfolio
%cd portfolio/

modify setting.py
ALLOWED_HOSTS = [‘colab.research.google.com’]

from google.colab.output import eval_js
print(eval_js(“google.colab.kernel.proxyPort(8000)”))

!python manage.py runserver 8000

then I open chrome with print(eval_js(“google.colab.kernel.proxyPort(8000)”)) string

the browser show: error 403 That’s an error. That’s all we know.