title: After configure Django with Postgres, Nginx, and Gunicorn on CentOS 8,no matter how i change the Django ,there has no change
body: <p>Recently I configure the web server as the guide of this link:</p>
  
  <p><a href="https://www.digitalocean.com/community/tutorials/how-to-set-up-django-with-postgres-nginx-and-gunicorn-on-centos-7#create-a-python-virtual-environment-for-your-project" rel="nofollow noreferrer">https://www.digitalocean.com/community/tutorials/how-to-set-up-django-with-postgres-nginx-and-gunicorn-on-centos-7#create-a-python-virtual-environment-for-your-project</a></p>
  
  <p>I can normally visit the homepage like:
  <a href="https://i.stack.imgur.com/OVo1g.png" rel="nofollow noreferrer">the normal page</a>
  AND I can normal visit domain_name/admin .</p>
  
  <p>After that ,when i create my_apps,even i change the url this:</p>
  
  <pre><code>from django.conf.urls import url,include
  from django.contrib import admin
  
  urlpatterns = [
  
  ]
  </code></pre>
  
  <p>Once i visit the domain_name or domain_name/admin or IP/admin,there has no change.There has no warning and no change</p>