1.0.0

You're no more required to download the serviceAccountKey.json file in the server folder.

So instead you should fill the application's datasource file which is located in /server/datasources.json with those details, You can find them in the downloaded JSON file from the Google Cloud Platform.

"firestore": {
  "name": "firestore",
  "projectId": "",
  "clientEmail":  "",
  "privateKey": "",
  "databaseName": "" // Optional, Default: projectId
}

Connection properties

Property	Type	Description	---
projectId	String	project_id in the JSON file	---
clientEmail	String	client_email in the JSON file	---
privateKey	String	private_key in the JSON file	---
databaseName	String	Firebase's project id	Optional, Default: projectId

And you can actually store those private details as an Environment variables, Check source-configuration