Static content not loaded in helm installation on Openshift

I’ve installed Gitlab on Openshift using the helm chart. Installation runs smoothly and all pods are up and fine but when I access the web app no static content is loaded (errors 404 can be seen in the logs). I’ve found that the reason for that is that in the file production.rb I have

config.public_file_server.enabled = false

How can I set config.public_file_server.enabled = true? production.rb is a file generated during the installation or included in the base image.

I must mention that I’m not installing the nginx ingress controller, I’m using OpenShift routes to provide access to the application.