Handler for Prometheus alerts, allow silencing and routing alerts to multiple services. Inspired by https://github.com/stefanprodan/swarmprom
First, create a bot https://core.telegram.org/bots#creating-a-new-bot (using @BotFather) and save the token.
There is no need to create a different one for each environment, because same bot can be joined to multiple chat groups.
Don't add your bot when creating the chat group, because this event won't be reported at getUpdates.
Get chat group ID from https://api.telegram.org/bot${TELEGRAM_BOT_TOKEN}/getUpdates.