const fetch = require('node-fetch') vs import fetch from 'node-fetch'

[bytrangle]

First off, thanks for the great demo.

However, It seems that with the newer versions of node-fetch, you will get this error: TypeError: fetch is not a function and you won't be able to post a message to Slack.

This problem is well-discussed here.

Since the project is based on create-react-app anyway, I suggest changing the import command to import fetch from 'node-fetch.