Simple flask application :)

In folder with Makefile run commands:
make venv which creates virtualenv and install all required dependencies
make dev_run which runs app locally ("localhost:5000/")

Firstly install heroku cli and create account: Heroku DOC

1. heroku create only if it's new app, omit this step if you want just update.
2. git push heroku master or if you want push changes from another branch to test run: git push heroku <branch>:master.

1. heroku open or heroku open --app <app_name> opens application in web browser.
2. heroku list shows list of your apps.
3. heroku logs --tail shows logs.