Set Email alert for child doctype


I have added child table “Project Member” in Project Doctype. It’s a list of employees assigned to a project.
I want to send an email alert to employees when they are added to “Project Member” list fo project or removed from it.

But I am able to set an Email alert for child Table on insert or removed event.

Is there a way I can achieve this either using email alert for child table or using hooks.