changing the IP from localhost:5000 to localhost:{something else}

hi, I am hoping you can help me.

I am trying to create a site using docker where the localhost isnt going to 5000, I have been googling around and I cant seem to get it right.

I amend the docker-compose.yml, ckan ports to 8736.
I amend the default.ini file port to 8736.
the .env

when I run the docker-compose it looks like it builds to the new port but I cant see the ckan site.

any tips?