NGINX Configuration Directive Reference
Almost all the configuration directives for Zimbra NGINX Proxy are controlled by LDAP attributes, and in some cases, by LocalConfig values. To simplify the Proxy Configuration, the NGINX Proxy Configuration Generator reads these LDAP/LocalConfig values, and generates the Proxy configuration files. To allow more flexibility to the process of config generation, the Config Generator reads in a set of template files, substitutes certain keywords with the actual values from LDAP/LocalConfig, and generates the configuration files for use with NGINX.
Both, the Proxy configuration files, and the Proxy configuration templates, are hierarchical in nature, which means that a main, top-level configuration file or template, includes other configuration files or templates respectively. Refer to NGINX Configuration Structure for the Proxy Configuration Inclusion Hierarchy