Configure email alert action via docker environment variables

Hi,

Is it possible to configure email settings via environment variables?

Docs says:

You configure the accounts Watcher can use to send email in the >xpack.notification.email namespace in elasticsearch.yml .

I know we could set elasticsearch.yml options via docker environment variables but so far this is not working as expected:

      - "xpack.notification.email.account.gmail_account.profile=gmail"
      - "xpack.notification.email.account.gmail_account.smtp.auth=true"
      - "xpack.notification.email.account.gmail_account.smtp.starttls.enable=true"
      - "xpack.notification.email.account.gmail_account.smtp.host=smtp.gmail.com"
      - "xpack.notification.email.account.gmail_account.smtp.port=587"
      - "xpack.notification.email.account.gmail_account.smtp.user=info@mail.info"
      - "xpack.notification.email.account.gmail_account.smtp.password=foo"

Is this possible? I want to avoid as much as possible bind mount the config file.

Anyone on this topic? It seems not possible to configure that way.