How to deploy?

You just commit and push your code to deploy branch. But be careful not to commit and merge your database and setting file (db.sqlite3, cq_backend/settings.py) If you don't know how to do that precisely, just do like below

In case in your own branch,

    git add .
    git reset HEAD db.sqlite3
    git reset HEAD cq_backend/settings.py
    git commit -m "your commit message"
    
    git checkout deploy
    git merge <your branch name> --no-ff
    git push origin deploy

After that, login to server using

    ssh -i <your/pem file path/name.pem> ubuntu@ec2-13-209-74-251.ap-northeast-2.compute.amazonaws.com
    cd /srv/ScienceNewsResearch-back

command on your terminal. You can download name.pem if you are authorized user of above server. And then, just pull remote origin/deploy source by

    git pull

What if I change my model or make some migrations?

If you change your model and migrate correctly, there must be some new files in cq/migrations. It means that after you pull source code from remote, you also should apply migrations to server's database. So after pull source with above command,

    source /srv/ScienceNewsResearch-back/v2env/bin/activate
    cd /srv/ScienceNewsResearch-back/
    python manage.py migrate