Töltsd ki a Firebase adatokat a .env.local fájlban.
NEXT_PUBLIC_FIREBASE_API_KEY=... NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN=... NEXT_PUBLIC_FIREBASE_PROJECT_ID=... NEXT_PUBLIC_FIREBASE_STORAGE_BUCKET=... NEXT_PUBLIC_FIREBASE_MESSAGING_SENDER_ID=... NEXT_PUBLIC_FIREBASE_APP_ID=...