Source: https://serial.rodeo/posts/ha-unraid-notifications/

  • Login to Home Assistant
  • Go to Settings > Automations
  • Create Automation
    • When > Add Trigger > Webhook
    • Then do > Notifications: Send a notification with [device name]
    • Edit in YAML 
      action: notify.my_devices
metadata: {}
data:
message: "{{ trigger.json.embeds[0].description }}"
title: "{{ trigger.json.embeds[0].title }}"
    • Copy Webhook ID
    • Save
  • Login to Unraid
  • Go to Settings > Notifications
  • Check agents to any of the notifications you want to receive
  • Scroll down to Discord
    • Agent function > Enabled
    • Paste the webhook ID from the Home Assistant notification
    • Apply
    • Test