What is a Telegram Mini App: https://core.telegram.org/bots/webapps

What to build? Check our Tech Doc: https://docs.google.com/document/d/1jibCa1TVJH97FCx-WaoNzSXskcr0ibTgsNIPNPyLt7k/edit

Complete Nextjs Boiler Plate to get started: https://github.com/Buidlso/telegram-mini-app-nextjs-boilerplate