fix(registration): Add support to change the default regsitration mode

Author: kmala

charts/controller/templates/controller-deployment.yaml

@@ -53,6 +53,8 @@ spec:
 {{- end}}
 {{- end}}
           env:
+            - name: REGISTRATION_MODE
+              value: {{ .Values.registration_mode }}
             # NOTE(bacongobbler): use deis/registry_proxy to work around Docker --insecure-registry requirements
             - name: "DEIS_REGISTRY_SERVICE_HOST"
               value: "localhost"

charts/controller/values.yaml

@@ -4,6 +4,11 @@ docker_tag: canary
 app_pull_policy: "Always"
 # limits_cpu: "100m"
 # limits_memory: "50Mi"
+# Possible values are:
+# enabled - allows for open registration
+# disabled - turns off open registration
+# admin_only - allows for registration by an admin only.
+registration_mode: "enabled"
 
 global:
   # Set the storage backend