Launching nodes overwrites existing docker images

I have an AWS AMI with docker 18.09.7 installed along with a docker image I would like to use on my cluster. When launching nodes it appears that Docker is being installed on the node which I think is deleting my previously added docker image. Is there a way to prevent Rancher from reinstalling Docker on nodes at launch? I have Docker set to start automatically through

sudo systemctl enable docker

and I have removed the docker install url from the node template. Also the volume size is only filled to 50% capacity.