(此项目搁置中，后端有时没在运行)
https://three-body.pustot.com/
Three-body problem simulation
sudo python3 -m flask run --host=0.0.0.0 --cert=/etc/letsencrypt/live/yangchnx.com/fullchain.pem --key=/etc/letsencrypt/live/yangchnx.com/privkey.pem
# sudo pip3 install gunicorn
sudo gunicorn -w 1 -b 0.0.0.0:5000 app:app --daemon --access-logfile=access.log --error-logfile=error.log --certfile=/etc/letsencrypt/live/yangchnx.com/fullchain.pem --keyfile=/etc/letsencrypt/live/yangchnx.com/privkey.pem
sudo pkill gunicorn