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/installer/values-tmpl/appmanager.cue b/core/installer/values-tmpl/appmanager.cue
index 24d0d8d..1cd7dbf 100644
--- a/core/installer/values-tmpl/appmanager.cue
+++ b/core/installer/values-tmpl/appmanager.cue
@@ -69,7 +69,10 @@
 			values: {
 				repoAddr: input.repoAddr
 				sshPrivateKey: base64.Encode(null, input.sshPrivateKey)
+				// TODO(gio): de-hardcode these variables
 				headscaleAPIAddr: "http://headscale-api.\(global.namespacePrefix)app-headscale.svc.cluster.local"
+				dnsAPIAddr: "http://dns-api.\(global.namespacePrefix)dns.svc.cluster.local"
+				clusterProxyConfigPath: "/apps/private-network/resources/proxy-backend-config.yaml"
 				ingress: {
 					className: input.network.ingressClass
 					domain: _domain