Python Flask, RASA NLU, RASA Core, AJAX, HTML, CSS
Flask is a microframework which make core simple but extensible. For the service like chatbot it best suits because it helps making backend light weight.
Rasa is an open source machine learning framework for automated text and voice-based conversations. Understand messages, hold conversations, and connect to messaging channels and APIs. We have also tried ChatterBot which is also being used to built chatbots in python. But as we found the better quality of response in RASA compared to ChatterBot. While response time in RASA is higher.
We have followed flask project layout by using reference of flask documentation tutorial. Read more about it here
In first release CrononaBot hase limited functionality and respond to only basic greetings and simple covid queries. For the first release our goal was to achive basic functionality and to prepare foundation for the project.