GitLab k8s runner with docker image from insecure registry

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I am using GitLab with a runner on kubernetes.
I have a pipeline that needs my docker image from a insecure registry. So the first line of my .gitlab-ci.yml is:
image: "nexus:8082/myimage:1.0"

When I run the pipeline I receive the following error:
Error response from daemon: Get “https://nexus:8082/v2/”

As you see it’s trying to connect on https, while my docker registry is insecure.

I tried to follow instruction I read at

I created a daemon.json file with this content:

{
  "insecure-registries" : ["nexus:8082"]
}

And then I create a configmap like this:
kubectl create configmap docker-daemon --namespace cicd --from-file /tmp/daemon.json

I have edited my config.toml to be this:

concurrent = 4
[[runners]]
  name = "gitlab-runner"
  url = "http://gitlab"
  token = "Vs785eyg2JZ3-V5yGsBQ"
  executor = "kubernetes"
  [runners.kubernetes]
    tls_verify = false
    privileged = true
    namespace = "cicd"
    pull_policy = "always"
    poll_timeout = 600
    cpu_request = "1"
    service_cpu_request = "200m"
    [[runners.kubernetes.volumes.config_map]]
      name = "docker-daemon"
      mount_path = "/etc/docker/daemon.json"
      sub_path = "daemon.json"

I also have a DOCKER_AUTH_CONFIG CI/CD variable with value:

{
    "auths": {
        "nexus:8082": {
            "auth": "YWRtaW46YWRtaW4="
        }
    }
}

So far these settings have no effect on letting GitLab get the image from an insecure registry using http instead of https. Any help is much appreciated.