Let say you want to host example1.com, example2.com, and example3.com on your machine, respectively to localhost:8080, localhost:8181, and localhost:8282.
Note: Since you don't have access to a DNS server, you should add domain name entries to your /etc/hosts (you can't do this on CDF machines):
... 127.0.0.1 example1.com example2.com example3.com ... To proxy eaxmple1.com we can't use the location part of the default server. Instead we need to add another server section with a server_name set to our virtual host (e.g., example1.com, ...), and then a simple location section that tells nginx how to proxy the requests: