Added the template for Project Harbor (Cattle only)

templates/project-harbor/3/README.md

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+##Harbor 1.1.1 deployment: distributed (revision 0)
+
+This version deploys `Harbor` 1.1.1 on a Cattle cluster.
+
+All hosts have to have the `harbor-log=true` label (the log container needs to be deployed on all of them).
+
+Also, `Traefik` needs to be enabled on one of the host and a proper DNS configuration needs to be in place.  
+
+Last but not least a storage service for named volumes needs to be available (this catalog entry has been tested with `rancher-nfs` which needs to be activated separately and prior to launch the distributed Harbor deployment).
+
+Note that:
+- the `IP/Hostname/FQDN` can be arbitrary set but the `(Traefik) domain` parameter needs to be a domain name that resolves to the host where `Traefik` is running
+- this catalog entry only supports `http` (`https` access is not supported)
+- because only `http` is supported, the Docker Host pulling/pushing from/to Harbor needs to have the `--insecure-registry` flag properly configured
+- while the Rancher UI may show that stack upgrades are available, upgrades are not supported at this point  
+- sometimes the proxy front-end fails to configure properly (due to a race condition) and it shows the "welcome to NGINX" page. If it happens, try to re-deploy the restart the `proxy` container
+
+![](distributed.png)