config.yml

parameters:
    locale: en
    cloud_storage:
        scope: '%google_cloud_storage_scope%'
        key: '%google_cloud_storage_private_key_location%'
#...
fos_rest:
    param_fetcher_listener: true
    body_listener: true
    format_listener: false
    view:
        view_response_listener: 'force'
        formats:
            xml: true
            json : true
        templating_formats:
            html: true
        force_redirects:
            html: true
        failed_validation: HTTP_BAD_REQUEST
        default_engine: twig
    routing_loader:
        default_format: json
    serializer:
        serialize_null: true

knp_gaufrette:
    stream_wrapper: ~
    adapters:
        release_notes_adapter:
            google_cloud_storage:
                service_id: 'app.google_cloud_storage.service'
                bucket_name: '%release_notes_bucket_name%'

    filesystems:
        release_notes_filesystem:
            adapter:    release_notes_adapter
            alias:      release_notes_filesystem

vich_uploader:
    db_driver: orm
    storage: gaufrette
    mappings:
      release_note_mapping:
            upload_destination: release_notes_filesystem