added an regular rebuild of the images

.forgejo/workflows/container-build.yml

@@ -1,10 +1,7 @@
 on:
   workflow_dispatch:
-  #push:
+  schedule:
-  #  branches:
+    - cron: "0 0 1 * *"
-  #    - stable
-  #schedule:
-  #  - cron: "0 0 1 * *"
 
 jobs:
   debian: