chore: delete untagged images

Author: rjaegers

.github/workflows/image-cleanup.yml

@@ -3,7 +3,7 @@ name: Cleanup Images
 
 on:
   schedule:
-    - cron: "30 1 * * *"
+    - cron: "0 0 * * 3"
   pull_request:
   workflow_dispatch:
 
@@ -13,6 +13,8 @@ jobs:
   delete-images:
     runs-on: ubuntu-latest
     permissions:
+      # dataaxiom/ghcr-cleanup-action needs packages write permission
+      # to delete untagged and orphaned images
       packages: write
     steps:
       - uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
@@ -24,5 +26,7 @@ jobs:
             ghcr.io:443
       - uses: dataaxiom/ghcr-cleanup-action@cd0cdb900b5dbf3a6f2cc869f0dbb0b8211f50c4 # v1.0.16
         with:
+          dry-run: true
           delete-orphaned-images: true
+          delete-untagged: true
           packages: amp-devcontainer,amp-devcontainer-cpp,amp-devcontainer-rust