Create a .env file and add firebase credientials to it
NEXT_PUBLIC_FIREBASE_API_KEY="" NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN="" NEXT_PUBLIC_FIREBASE_PROJECT_ID="" NEXT_PUBLIC_FIREBASE_AUTH_STORAGE_BUCKET="" NEXT_PUBLIC_FIREBASE_MESSAGING_SENDER_ID="" NEXT_PUBLIC_FIREBASE_APP_ID="" NEXT_PUBLIC_FIREBASE_MEASUREMENT_ID=""