Stand-alone JS bundle not working

[tronidale]

Describe the bug
I followed the documentation from botonic website: https://botonic.io/docs/deployment/standalone-js-bundle
My goal is to add a simple chatbot to my spring bot application.
I was able to make it using the guide above. Unfortunately, the route and action is not working.

To Reproduce
Steps to reproduce the behaviour:

1. Create a simple action and route it from routes.js

What is the expected behaviour?
It should be able to response from the predefined reply from the action.

action/hi.js

import React from 'react'
import { Text } from '@botonic/react'

export default class extends React.Component {
  render() {
    return (
      <Text>
      Hello!
      </Text>
    )
  }
}

routes.js

import Hi from './actions/hi'

export const routes = [
  {
    path: 'hi',
    text: 'hi',
    action: Hi
  },
]

Screenshots
If applicable, add screenshots to help explain your problem.

About the environment
botonic v0.21.0

Other information
If not using stand-alone JS bundle, route and action works.

Please advise