UNAUTHORIZED: authentication required

[tbernacchi]

I'm new with kaniko, I ended up here because I was trying to build a pipeline with argo and one the steps I got the message that docker not found. Which it makes sense since my kubernetes cluster was build with containerd as a CRI. Now I'm trying to build a simple image using kaniko and I can't make it work. This is the .yaml file I'm using to try to build a Docker image and send to Docker registry.

---
apiVersion: v1
kind: Pod
metadata:
  name: kaniko
  namespace: fibonacci
spec:
  containers:
  - name: kaniko
    image: gcr.io/kaniko-project/executor:v1.23.1
    args: ["--dockerfile=/Dockerfile/Dockerfile", "--context=/workspace", "--destination=tadeuuuuu/fibonacci:v0.1.6"]
    volumeMounts:
      - name: dockerfile
        mountPath: /Dockerfile
      - name: kaniko-secret
        mountPath: /kaniko/.docker/
        readOnly: true
  restartPolicy: Never
  volumes:
    - name: dockerfile
      configMap:
        name: dockerfile-config
    - name: kaniko-secret
      secret:
        secretName: docker-registry-secret

For docker-registry-secret I've followed these steps:

kubectl create secret docker-registry docker-registry-secret --from-file=.dockerconfigjson=config.json -n fibonacci

My config.json:

{
  "auths": {
    "https://index.docker.io/v1/": {
      "auth": "MY-TOKEN-FROM-DOCKERHUB"
    }
  }
}

k create -f kaniko-test.yaml
pod/kaniko created

k get pods -n fibonacci | grep -i kaniko
kaniko                                            0/1     Error    0          15m

k logs pod/kaniko -n fibonacci
error checking push permissions -- make sure you entered the correct tag name, and that you are authenticated correctly, and try again: checking push permission for "tadeuuuuu/fibonacci:v0.1.6": POST https://index.docker.io/v2/tadeuuuuu/fibonacci/blobs/uploads/: UNAUTHORIZED: authentication required; [map[Action:pull Class: Name:tadeuuuuu/fibonacci Type:repository] map[Action:push Class: Name:tadeuuuuu/fibonacci Type:repository]]

Any ideas what I'm missing? Any help will be appreciate! Thank you