ClusterManager: Implements support of remote clusters.

After this change users will be able to:
* Create cluster and add/remove servers to it
* Install apps on remote cluster
* Move already installed apps between clusters
* Apps running on server being removed will auto-migrate
  to another server from that same cluster

This is achieved by:
* Installing and running minimal version of dodo on remote cluster
* Ingress-nginx is installed automatically on new clusters
* Next to nginx we run VPN client in the same pod, so that
  default cluster can establish secure communication with it
* Multiple reverse proxies are configured to get to the
  remote cluster service from ingress installed on default cluster.

Next steps:
* Support remote clusters in dodo apps (prototype ready)
* Clean up old cluster when moving app to the new one. Currently
  old cluster keeps running app pods even though no ingress can
  reach it anymore.

Change-Id: Iffc908c93416d4126a8e1c2832eae7b659cb8044
diff --git a/core/dns-api/Makefile b/core/dns-api/Makefile
index 1f127cb..bd78618 100644
--- a/core/dns-api/Makefile
+++ b/core/dns-api/Makefile
@@ -1,7 +1,7 @@
 repo_name ?= dtabidze
 podman ?= docker
 ifeq ($(podman), podman)
-manifest_dest=docker://docker.io/$(repo_name)/pcloud-installer:latest
+manifest_dest=docker://docker.io/$(repo_name)/dns-api:latest
 endif
 
 clean: