dev.to-clone/src/config/firebase.js

import { initializeApp } from 'firebase/app';
import { getStorage } from 'firebase/storage';
import { getFirestore } from 'firebase/firestore';
import { getAuth } from 'firebase/auth';

const firebaseConfig = {
   apiKey: process.env.REACT_APP_API_KEY,
   authDomain: process.env.REACT_APP_AUTH_DOMAIN,
   projectId: process.env.REACT_APP_PROJECT_ID,
   storageBucket: process.env.REACT_APP_STORAGE_BUCKET,
   messagingSenderId: process.env.REACT_APP_MSGSENDER_ID,
   appId: process.env.REACT_APP_APP_ID,
};

const app = initializeApp(firebaseConfig);

export const storage = getStorage(app);
export const db = getFirestore(app);
export const auth = getAuth(app);