Enable NGINX fastcgi_pass

Hi Guys.
We’re currently in the process of Migrating out Magento 1 system to Magento 2 and have decided to use the Ubertheme migrator. I had the following questions:

1. Before undertaking data migration we already built the site, installed extensions and put some brands/categories and test customers on as we were told  that data migration should be the LAST step we undertook. Will this adversely affect the data migration process or will the values on there simply be overwritten?

Upon consulting the Readme file we were given the following instruction:

• Step 1. Check your current Nginx configuration:
  If you have custom Nginx configuration, you need to check the following Nginx parameter: fastcgi_pass {your_value}
  -- Open our UB Data Migration Pro’s Nginx configuration file at: path_to_your_magento2/pub/ub-tool/nginx.conf.
  -- Then find the line fastcgi_pass 127.0.0.1:9000;, and replace this parameter with your own value fastcgi_pass {your_value};.
• Step 2: please add the following configuration to the end of your nginx.conf file: include path_to_your_magento2/pub/ub-tool/nginx.conf;
  Sample configuration in your nginx.conf file:

I am not currently sure if we use NGINX as the site is hosted by an external company. where would I find this information?
 
Thanks for your time