How to create systemd for django python under ubuntu?

I created /etc/systemd/system/django.service

[Unit]
Description=Unit crm3
After=network.target
[Service]
Restart=on-failure
WorkingDirectory=/var/www/repocrm3/RepositoryCRM3/
ExecStart=/var/www/repocrm3/repocrm3_env/bin/gunicorn RepositoryCRM3.wsgi -b 0.0.0.0:8000
[Install]
WantedBy=multi-user.target

systemctl daemon-reload

systemctl -l status django

if i run directly via python manage.py runserver everything works. what is the problem?

(repocrm3_env) lapitsky@crm3:/var/www/repocrm3/RepositoryCRM3$ **python manage.py runserver**
Watching for file changes with StatReloader
Performing system checks...
System check identified no issues (0 silenced).
April 09, 2022 - 00:33:46
Django version 3.1.4, using settings 'RepositoryCRM3.settings'
Starting development server at
Quit the server with CONTROL-C.

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