swan: Use harbor cache to pull docker images

This is because dockerhub and other registries impose rate limits when
pulling images from their repositories.

swan/values.yaml

@@ -80,6 +80,9 @@ jupyterhub:
     service:
       type: ClusterIP
     chp:
+      secretSync:
+        image: "registry.cern.ch/quay.io/jupyterhub/k8s-secret-sync"
+        tag: "set-by-chartpress"
       networkPolicy:
         enabled: true
         egressAllowRules:
@@ -88,7 +91,7 @@ jupyterhub:
           dnsPortsPrivateIPs: false
           privateIPs: false
       image:
-        name: "jupyterhub/configurable-http-proxy"
+        name: "registry.cern.ch/quay.io/jupyterhub/configurable-http-proxy"
         tag: "4.5.0"
         pullPolicy: "IfNotPresent"
       resources:
@@ -201,6 +204,7 @@ jupyterhub:
   prePuller:
     hook:
       enabled: true
+      image: "registry.cern.ch/quay.io/jupyterhub/k8s-image-awaiter"
     continuous:
       enabled: false
     containerSecurityContext: