Why doesn't the bot work on Heroku?

Question

Python

I'm writing a bot on Discord. I'm trying to host on Heroku, everything seems to be successful:

2019-12-29T11:58:31.000000+00:00 app[api]: Build succeeded

But the bot itself is offline, showing no signs of life. However:
C:\Python\bot>heroku local
- and the bot works successfully, responds.

Procfile, requirements and more under the cut.

Procfile:
worker: bot.py
requirements.txt:

discord.py==1.2.3
aiohttp
websockets
chardet

runtime.txt:
python-3.7.3

Although, if it works locally, then why not work on the server.
With what it can be connected?

Answer 1

Procfile: worker: python3 bot.py
heroku ps:scale worker=1

Answer 2

with rights