The game only relies on two API services, the Spotify API, and the Genius API. Their credentials are stored in a .env file, which looks like the following
REACT_APP_GENIUS_API_KEY=YOUR_GENIUS_API_KEY
REACT_APP_SPOTIPY_CLIENT_ID=YOUR_SPOTIFY_APP_CLIENT_ID
REACT_APP_SPOTIPY_CLIENT_SECRET=YOUR_SPOTIFY_APP_CLIENT_SECRET
REACT_APP_SPOTIPY_REDIRECT_URI=YOUR_SPOTIFY_APP_REDIRECT_URI #usually something like http://localhost:3030
REACT_APP_BACKEND_URL=THE_URL_OF_THE_BACKEND_SERVER #usually something like http://localhost:5000
The game also relies on a backend server, which was written in express.js. You can find the other repository at https://github.com/AdrianN001/Lyricsify-api
Unfortunatly, due to Spotify's policy it is unfeasible to exit from the developer mode of the project, and therefore to publish the website.