browser requet to proxy is using localhost

Hey,

This is an obvious question, must have been asked, but I could not find existing ones.

I have a jetty web server using localhost:8080. I am using nginx as proxy with www.somedomain.com.
I have configured it working for first page, access www.somedomain.com redrects to localhost:8080.
But the links in the web pages downloaded to browser are still using loalhost:8080/**, it should be using www.somedomain.com.
What should I do to ensure all page links are using proxy url, www.somedomain.com, not localhost:8080.

Thanks in advance for any input/pointers.

G