Update README.md

Author: Michael Sauter

README.md

@@ -70,6 +70,10 @@ All commands depend on a current OpenShift session and accept a `--namespace` fl
 
 ## How-To
 
+### Template Authoring
+
+Please consult the [OpenShift Templates documentation](https://docs.openshift.com/container-platform/3.11/dev_guide/templates.html) on how to write templates to express the desired state. For in-depth knowledge about how the configuration in the templates get applied to the current state in the cluster, read [Declarative Management of Kubernetes Objects Using Configuration Files](https://kubernetes.io/docs/tasks/manage-kubernetes-objects/declarative-config/).
+
 ### Working with Secrets
 
 Keeping the OpenShift configuration under version control necessitates to store secrets. To this end Tailor comes with a `secrets` subcommand that allows to encrypt those secrets using PGP. The subcommands offers to `edit`, `re-encrypt` and `reveal` secrets, as well as adding new keypairs via `generate-key`.