i don't see a field for nginx_server_name

[yishairasowsky]

i am trying to install lex nlp onto my machine
(unless there is a way to use it remotely...)
at the website https://github.com/LexPredict/lexpredict-contraxsuite-deploy/tree/1.0.1
it says to do the following
nginx_server_name should be equal either dns_name (if https enabled) or public_ip
But my trouble is that I don't see that line in the local/fabricrc file...
any ideas?