Etherpad: Installer configuration

Change-Id: I808e3c1835e2f0bf5fe2e0da138710c979a38e38
diff --git a/core/installer/app_repository.go b/core/installer/app_repository.go
index e4f462e..e0f97fc 100644
--- a/core/installer/app_repository.go
+++ b/core/installer/app_repository.go
@@ -25,6 +25,7 @@
 	"values-tmpl/url-shortener.cue",
 	"values-tmpl/matrix.cue",
 	"values-tmpl/vaultwarden.cue",
+	"values-tmpl/etherpad.cue",
 	// "values-tmpl/open-project.cue",
 	"values-tmpl/gerrit.cue",
 	"values-tmpl/jenkins.cue",