Not to crap all over your project OP, I think the idea is a good one. Maybe if we could have the choice of Telegram, or Slack, or some other service, or as @lelovsky@szmer.info said, just ssh in. Telegram is pretty neat and all, but I've never been convinced of it's security. I did test it out once, and even though I only used it in the manner of which you are, to administrate containers, I got a lot of spam of the x-rated kind which are usually just scams.

• great idea
• might need some options