AuthProxy: Render unauthorized page

Change-Id: I979762c63b0d1b3c3674fd0b9ab79ccd8849887a
diff --git a/charts/auth-proxy/templates/install.yaml b/charts/auth-proxy/templates/install.yaml
index bcc3a15..09a1059 100644
--- a/charts/auth-proxy/templates/install.yaml
+++ b/charts/auth-proxy/templates/install.yaml
@@ -42,5 +42,6 @@
         - --whoami-addr={{ .Values.whoAmIAddr }}
         - --login-addr={{ .Values.loginAddr }}
         - --membership-addr={{ .Values.membershipAddr }}
+        - --membership-public-addr={{ .Values.membershipPublicAddr }}
         - --groups={{ .Values.groups }}
         - --upstream={{ .Values.upstream }}