[ci] publish upon release as well

Author: pattacini

.github/workflows/publish-docker.yml

@@ -2,6 +2,8 @@ name: Publish Docker Image
 
 on:
   workflow_dispatch:
+  release:
+    types: [created]
 
 jobs:
   publish:
@@ -18,4 +20,10 @@ jobs:
         password: ${{ secrets.GITHUB_TOKEN }}
         workdir: scripts/dockerfiles
         buildargs: DEPENDENCIES_DIR
-        registry: ghcr.io
+        registry: ghcr.io
+    - uses: actions/[email protected]
+      with: 
+        package-name: 'robots-configuration'
+        package-type: 'container'
+        num-old-versions-to-delete: 10
+        delete-only-untagged-versions: "true"