Track egress bandwidth for a server block

[justink101]

Thanks for linking, but nginx-module-vts seems over-kill and I'm concerned
about performance. Essentially we are building a product that charges by
egress bandwidth and looking for a way to track it at the NGINX level. I was
digging a bit further and it seems like using
https://www.nginx.com/blog/launching-nginscript-and-looking-ahead/ might be
a good solution. Anybody tried this? Anybody have a starting point
configuration?

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,277303,277313#msg-277313