[X] Menu for direct messages
	[X] Commands for new user registration
	[ ] If registered/online -- responding to PMs (always require prefix)

[X] Open upstream connections
	[X] when registered users join the groupchat
	[X] open existing connections at app startup

[ ] Handle upstream messages
	[ ] Coalesce matches from multiple upstream connections?
	[ ] When recieving a PM - send directly to telegram user account

[ ] Graceful termination
	[ ] Ability to close nmdc connections
	[ ] Close nmdc connection && deregister user (with bot message) when user leaves groupchat

[X] Block unknown users from entering telegram channel

[ ] Attachment support
	[ ] Convert telegram files/images/videos to raw URLs for NMDC
		[ ] Bot API does allow downloading - but (?authenticated)? need to re-host (either internally or upload to contented server)
	[ ] Contented support - convert known URLs with image mime type to telegram images

[ ] Publish