follow tutorial from @clever-programmer on YouTube youtube.com/watch?v=XtMThy8QKqU&t=7697s
- get api keys from TMDB & get by postman
- firebase hosting set-up & create-react-app npm install 3-1. axios (for create baseURL) 3-2. react-youtube 3-3. movie-trailer
- firebase hosting to own app
- deploy app to firebase & host online
- async function
- fetchUrl
- URLSearchParams
- .. etc.