1. Ensure that Python, Flask, SQLAlchemy, and ChatterBot are installed (either manually, or run pip install -r requirements.txt).
2. Run app.py
3. Demo will be live at http://localhost:5000/

If you do not have a dedicated server, I highly recommend using PythonAnywhere, AWS or Heroku to host your application.

Here is a quick 5 minute video on how to get setup: https://youtu.be/VP0HvbunaRo

If you are deploying on Heroku, you will have to change the database adapter from chatterbot.storage.SQLStorageAdapter to chatterbot.storage.MongoDatabaseAdapter since SQLite3 isn't supported. To do this simply change the following line:

english_bot = ChatBot("English Bot", storage_adapter="chatterbot.storage.SQLStorageAdapter")

... to use the MongoDB adapter:

english_bot = ChatBot("English Bot", 
                     storage_adapter = "chatterbot.storage.MongoDatabaseAdapter",
                     database = mongodb_name,
                     database_uri = mongodb_uri)

... where mongodb_name is the name of the database you wish to connect to and mongodb_uri is the URI of a remote instance of MongoDB.

This source is free to use, but ChatterBot does have a license which still applies and can be found on the LICENSE page.