Unzip, open terminal/cmd prompt in the folder, and run the following:
pip3 install virtualenv
python3 -m venv .
source bin/activate
pip3 install -r requirements.txt
git init
heroku create
heroku git:remote -a projectname
heroku stack:set heroku-16
heroku buildpacks:add https://github.com/jontewks/puppeteer-heroku-buildpack.git
heroku buildpacks:add heroku/python
git add .
git commit -am 'fix'
git push heroku master