We are trying to install Keycloak on a server behind a BigIP SSL terminator. Keycloak is running within a Docker container on a different server.

But trying to open the Administration Console fails because all the links within the markup are absolute links which is resolved to  

http://localhost:9555/auth/...

So both the scheme and the hostname is wrong.

Questions:

Why are these links absolute? Is there a way to configure this to be relative links?

Or, if they must be absolute, is there a way to configure the links to become correct?

From what I can gather, this is the line where the absolute link is resolved:

Thanks!