Update README.md

Author: scotty-c

README.md

@@ -39,7 +39,7 @@ image to simplify installation and use.
 If you do not already have Docker installed on your workstation, install it [here](https://www.docker.com/community-edition)
 
 The kubetool docker image takes each of the parameters as environment variables. When run as follows it will output a `kubernetes.yaml` file in your current working directory:
-
+```
 docker run --rm -v $(pwd):/mnt -e OS=debian -e VERSION=1.9.2 -e CONTAINER_RUNTIME=docker -e CNI_PROVIDER=weave -e FQDN=kubernetes -e IP=172.17.10.101 -e BOOTSTRAP_CONTROLLER_IP=172.17.10.101 -e ETCD_INITIAL_CLUSTER="etcd-kube-master=http://172.17.10.101:2380" -e ETCD_IP="%{::ipaddress_enp0s8}" -e KUBE_API_ADVERTISE_ADDRESS="%{::ipaddress_enp0s8}" -e INSTALL_DASHBOARD=true puppet/kubetool
 ```