AppManager: Add Excalidraw

Change-Id: I053676e18773e8dec452c54bda350cdc978ae0ca
diff --git a/core/installer/app_repository.go b/core/installer/app_repository.go
index cc3a35a..509c7e9 100644
--- a/core/installer/app_repository.go
+++ b/core/installer/app_repository.go
@@ -27,6 +27,7 @@
 	"values-tmpl/immich.cue",
 	"values-tmpl/vaultwarden.cue",
 	"values-tmpl/etherpad.cue",
+	"values-tmpl/excalidraw.cue",
 	// "values-tmpl/open-project.cue",
 	"values-tmpl/gerrit.cue",
 	"values-tmpl/jenkins.cue",