This project was bootstrapped with Create React App.
Create a firebase project and put the credentials in .env.local in such form:
REACT_APP_FIREBASE_API_KEY=Your_API_KEY
REACT_APP_FIREBASE_AUTH_DOMAIN=Your_Auth_Domain
REACT_APP_FIREBASE_DATABASE_URL=...
REACT_APP_FIREBASE_PROJECT_ID=...
REACT_APP_FIREBASE_STORAGE_BUCKET=...
REACT_APP_FIREBASE_MESSAGING_SENDER_ID=...
Then run the app with yarn start