automatically build newer nextcloud versions when they have ripened half a year

.forgejo/workflows/build_nextcloud.yml

@@ -11,6 +11,7 @@ on:
 
 jobs:
   get-versions:
+    name: Determine viable Nextcloud versions
     runs-on: docker
     container:
       image: docker.io/library/python:3.14-slim
@@ -19,6 +20,9 @@ jobs:
       versions: ${{ steps.matrix.outputs.versions }}
 
     steps:
+      - name: Install required system packages
+        run: apt-get update; apt-get install -y --no-install-recommends --no-install-suggests nodejs
+
       - name: Checkout source code
         uses: actions/checkout@v7