Allows Users to upload JSON to FireStore DB.
- You will need Service Account JSON file.
- Go to Google Cloud Console, Go to IAM & Admin
- Click Service accounts, if Key is not set, use Actions (three dots on the right) to create key.
- Use this JSON as referred in index.js
- Or refer https://cloud.google.com/iam/docs/creating-managing-service-account-keys for other options