supervisor.conf

[program:flaskblog]
directory=/home/YOUR_USER/YOUR_PROJECT
command=/home/YOUR_USER/YOUR_PROJECT/venv/bin/gunicorn -w 3 run:app
user=YOUR_USER
autostart=true
autorestart=true
stopasgroup=true
killasgroup=true
stderr_logfile=/var/log/flaskblog/flaskblog.err.log
stdout_logfile=/var/log/flaskblog/flaskblog.out.log