Alert bot

Inititally made for receiving results of computer modelling or other long-lasting calculations and programs

Well, it is not complicated for now and it has:

• Service that receives both text results on /result handler and images on /image handler
• Telegram package that is responsible for interaction with telegram bot (you should create it with Botfather and specify your own TELEBOT_API env)
• Storage with for now only subscriptions info (which users should get messages with updates: either text or images)