[Webchat] Prevent chatting until all the servers are up

[ivan-karlovich]

Description

When starting the app by running make_install, webchat opens before Rasa server is up. In case a user tries to chat with a bot, the bot does not respond and the following error occurs:

requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=8002): Max retries exceeded with url: /webhooks/rest/webhook (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f7629e0d9a0>: Failed to establish a new connection: [Errno 111] Connection refused'))

Suggestion for improvement

One of the solutions to the issue can be:

• Display a loader in the webchat until all the servers are up.
• Do not open webchat until the servers is up. Note. It will not work if a user decides to open the webchat manually.

Notes

• See the following comment for the details of the error: Improvements. Move web chat to React. Add sanic web server. Add black formatter, Add pre-commit hooks. Add github workflow. Refactoring. #12 (comment).