JavaScript haladó
1. Asszinkronitás
2. Arrow-k
3. Promise-ok
4. HTTP requestek
5. Fetch
6. Hármas tagolás
free APIs:
https://www.dnd5eapi.co/docs/#get-/api/races/-index-
https://github.com/sameerkumar18/geek-joke-api
https://sv443.net/jokeapi/v2/
http://jservice.io/
https://randomlovecraft.com/api/books
