I went through the etc/nginx/sites-available/default file but didn't find the configuration setup. In many Documentations explained about application but not how the webserver is configured.
https://openedx.atlassian.net/wiki/display/OpenOPS/Open+edX+Operations+Home
http://edx.readthedocs.io/projects/edx-installing-configuring-and-running/en/latest/index.html
Open Edx Customized the web server setup within the project folder of openedx ie. After installation of full stack instance. The directory structure as Follows: /etc/nginx/sites-enabled/
have link to another directory as follows: /edx/app/nginx/site-available/
have the lms, cms, xqueue etc.