How to make a S2I workflow in the rancher eco?

Hi, We are new in Rancher at our research institute, very fast path to deploy the whole infra, thanks for the great product!
We got now 6 node kubernetes cluster + 1 local cluster with Rancher up and running.
I was looking to translate our OKD/OpenShift workflows to Rancher infra.
Our .gitlab-ci.yml are based on the OpenShift templates coming with gitlab.
Are there similar workflows in Rancher eco like Source-to-Image (S2I)?