diff --git a/slides/dhbw/04_nodejs_basics.md b/slides/dhbw/04_nodejs_basics.md
index 083cd1c..5d2a03a 100644
--- a/slides/dhbw/04_nodejs_basics.md
+++ b/slides/dhbw/04_nodejs_basics.md
@@ -62,6 +62,15 @@ a {
 
 **Sommersemester 2026** · Sitzung 4 — Node.js: Scripting, Running and Building
 
+[https://librete.ch/dhbw/](https://librete.ch/dhbw/)
+
+---
+
+<!-- _header: '' -->
+<!-- _footer: '' -->
+
+![bg fit](./assets/qr/slides-dhbw.png)
+
 ---
 
 # Ressourcen zum Selbstlernen