Update build-image.yml

.github/workflows/build-image.yml

@@ -1,10 +1,10 @@
 name: Build and Push GTS-Federation Image
 
 on:
-  workflow_dispatch: # Manueller Start über den "Actions" Tab
+  workflow_dispatch: # Manueller Start
   push:
     branches:
-      - main # Baut auch automatisch, wenn du Code hochlädst
+      - main
 
 jobs:
   build:
@@ -15,7 +15,8 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set up Docker Buildx
-        uses: actions/setup-buildx-action@v3
+        # Hier lag der Fehler: Es muss 'docker/...' sein, nicht 'actions/...'
+        uses: docker/setup-buildx-action@v3
 
       - name: Log in to Docker Hub
         uses: docker/login-action@v3