please include and example bot (hello world bot)

I don't know how to start using Nadia to build my bot
it would be very helpful if you provide an example bot that I can copy past and run to see how it works

[alexfilatov]

https://github.com/lubien/elixir-telegram-bot-boilerplate I believe this one can help @abdoo9

[alexfilatov]

or this one https://medium.com/devmasterz/writing-a-telegram-bot-on-elixir-98fc328347c7