Enable Gitlab Docker prometheus

General
1

'm running Gitlab-Docker but I’m unable to connect to http://localhost:9090 where Prometheus is supposed to be. These are my commands on Ubuntu ARM64:

docker run \
  --detach \
  --restart always \
  --name gitlab-ce \
  --privileged \
  --memory 4096M \
  --publish 22:22 \
  --publish 80:80 \
  --publish 443:443 \
  --env GITLAB_OMNIBUS_CONFIG=" \
    external_url 'http://localhost';
    node_exporter['enable'] = true;
    grafana['enable'] = true;
    nginx['redirect_http_to_https'] = true; "\
  --volume /srv/gitlab-ce/conf:/etc/gitlab:z \
  --volume /srv/gitlab-ce/logs:/var/log/gitlab:z \
  --volume /srv/gitlab-ce/data:/var/opt/gitlab:z \
  yrzr/gitlab-ce-arm64v8:latest

The weird thing is that I can have access to Grafana on http://localhost/-/grafana and get some metrics, but I don’t have access to http://localhost/-/metrics endpoint either.
If I add: node_exporter['enable'] = true to GITLAB_OMNIBUS_CONFIG I can see all the metrics.

Could anybody help me out on this?, why I’m not being able to access Prometheus on HTTP://localhost:9090 and http://localhost/-/metrics? I couldn’t spot anything wrong on the logs.