Telegram

1. Get an API token using @Botfather.
2. Store token in argocd_notifications-secret Secret and configure telegram integration in argocd-notifications-cm ConfigMap:

apiVersion: v1
kind: ConfigMap
metadata:
  name: argocd-notifications-cm
data:
  service.telegram: |
    token: $telegram-token

1. Create new Telegram channel and add your bot as an administrator.
2. Create subscription for your Telegram integration:

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  annotations:
    notifications.argoproj.io/subscribe.on-sync-succeeded.telegram: my_channel