[system design] Tinder

Worum geht's?

We will solve this system design exercise: [Tinder](https://www.hellointerview.com/learn/system-design/problem-breakdowns/tinder) Organization: * we read the requirements * we do the class design individually, in 20 minutes * we present our designs, and discuss them * we write the pseudo code for the most important logic, individually, in 20 minutes * we present our pseudo code * we read the follow up questions, and discuss them together Requirements: * do not join if your microphone does no