Login FORM POST URL does not have hostname

[ankeshanand1]

I am running Geonode on 4.0.X in GIT and Docker and it's giving the following URL on login form:
http://{hostname}/geoserver/j_spring_security_check
Other than that, on the whole page, URLs are displayed correctly.

The .env file was generated using create-envfile.py script without any errors but only the Login URL is showing like this. I've checked and the variables related to hostname are already defined. However, because the environment is still in staging, I am using IP Address everywhere instead of a valid hostname(domain/subdomain)

Can anybody refer me on any possible solutions?