Portainer is a WebUI for Docker and Kubernetes. It is made to facilitate deployments on your infrastructure.
Kubernets often uses manifests to apply changes or deploy app in your infrastructure.
To install portainer the only thing you have to do is run:
kubectl apply -n portainer -f https://raw.githubusercontent.com/portainer/k8s/master/deploy/manifests/portainer/portainer.yamlUpdate from March 15 2023