Create a file src/firebase.js and place firebase project Keys inside as shown in src/firebase.example.js
Run app by typing npm start in command line
Make sure to read the Note section below
Note
All the functions which does the database transactions are created in a custom hook and imported into components. Check src\hooks\useFirestore.js
You will have to create Indexes in firestore, as HomePage, AlbumPage uses Nested Queries to fetch data from Firestore. While running the application for first time there will be an error in console stating you to create an Index in Firestore. That Error will provide a link to create an Index in Firestore , you can click on the link and create an Index. (This Error will be solved after that particular Index is created)
To Download Photo diretly from firebase storage in javacript as a Blob type, you have to change CORS policy in google cloud console, to know more check the below links