First, you have to create a new Slack application, then go to Add features and functionality > Incoming Webhooks and click on Add New Webhook to Workspace.

You must properly set the following environment variables: .env:

PORT - Port of the http server. (Optional) (Default port is 3000)

SLACK_WEBHOOK - your Slack webhook URL Example: https://hooks.slack.com/services/foo/bar/foobar123

SLACK_BOT_TOKEN CHANNEL - Channel on Slack

src/resources/slack_users.json - nickname mapping from GitHub to Slack

Example:

{
    "github-username": "slack-display-name",
    "John": "smith",
}

The keys (ex. "Mystraht") correspond to GitHub nicknames, and the values (ex. "John") correspond to Slack nicknames.

Slack have issue with space in nickname, in this case use instead:

{
    "John-Smith": "john.smith",
    "Jack": {
      id: "SLACK_USER_ID",
      name: "jack"
    },
}

You can then launch the Node server by running:

npm install
npm run start

You will then have to configure your GitHub webhook.

Go to your repository settings, and add a webhook with the following configuration:

Payload URL: http://<YOUR_DOMAIN_or_IP_ADDRESS>:3000/git/webhook
Content type: application/json
Event: Let me select individual events.
    -> Pull request
    -> Pull request review comment
    -> Pull request review

This version of Slack pull request notifier is tested with NodeJS LTS.

Feel free to submit a pull request!