Recipients reply ACK. With escalation on, the people listed are texted one at a time, in order, until someone ACKs.
Recipients reply Y to accept or N to decline. When someone declines, supervisors get a text with their name and number from the phone book.
Supervisors get texted when a schedule is declined or goes unanswered, and when nobody ACKs an alert.
Columns: name, phone, role, supervisor. The header row is optional. Numbers already in the phone book are updated.
Enter the ADMIN_TOKEN from your .env file. If you didn't set one, the server printed a token at startup.