Generate a channel webhook on Discord and enter it into the Webhook field. Select what notification type you want. Mention is the role ID you want mentioned. You must be in developer role to get the role ID.
Currently, this system only supports Discord webhooks.

Picture Guide

Find the channel in Discord that you want bossnotifications.
Click the settings cog.
Find and click the Integrations button.
Click the Create Webhook cutton.
Click the newly created webhook.
Click the Copy Webhook URL button.
Paste the copied URL into the webhook field on DFP.
Select the type of notifications you want from the dropdown.
Click the submit button and wait for the success text to appear under the submit button.