Whats the best way to update my Django site on DigitalOcean?

I’ve written a bash script that does it, given that we do not have any changes on server. Feel free to add/comment on improvements:

APP_NAME = Name of Application to display APP_FOLDER = Django project’s GIT root folder

Make sure to give Execute permissions on this script: chmod 777 /home/django/update_app.sh

#!/bin/bash
echo 'Updating <APP_NAME>...'
cd /home/django/<APP_FOLDER>/
source venv/bin/activate

if [ -z "$(git status --untracked-files=no --porcelain)" ]; then 

  if git pull origin master; then
    echo 'GIT PULL completed'
  else
    echo 'GIT PULL failed: exiting program.'
    exit
  fi

  echo 'Upgrading DB to latest...'
  export DJANGO_SETTINGS_MODULE=<APP>.settings-prod
  python3 manage.py migrate

  echo 'Restarting servers...'
  sudo systemctl daemon-reload
  sudo service gunicorn restart
  sudo service nginx restart
else
  echo 'There are modified files. Aborting update process..'
fi
echo 'Finished updating.'

i am using the git pull origin master command but it isn’t updating my python files like views, forms etc. All other files like html files are updated