feat(docs): add guide for setting up Telegram bot notifications (#483)

docs/fassets/guides/7-telegram-bot-notifications.mdx

@@ -0,0 +1,24 @@
+---
+sidebar_position: 6
+slug: telegram-bot-notifications
+title: Telegram Bot Notifications
+description: Set up a Telegram bot to receive notifications
+tags: [intermediate, fassets, bitcoin, dogecoin]
+authors: [fassko]
+keywords: [fassets, xrp, btc, doge flare-network, flare-network]
+---
+
+1. Get the API key from the [FAssets Telegram Bot](http://t.me/FlareFAssetsSongbirdBot) by sending `/events` and selecting `Subscribe to Events`.
+2. Add the following configuration to the `apiNotifierConfigs` list in the `config.json` file, replacing `API_KEY` with the key obtained from the bot.
+
+   ```json
+   {
+     "apiKey": "API_KEY",
+     "apiUrl": "https://fasset-tg-bot-songbird.flare.network",
+     "level": "danger"
+   }
+   ```
+
+:::info
+Please note that notifications will only be sent out for **danger** and **critical** levels, regardless of the configured level. This is enforced by the Telegram bot, which ignores other events to prevent unnecessary HTTP requests.
+:::