Container retention via version tagging (#3491)

* Use github action expression syntax
to alias over github repository name

* Tag by version instead of by timestamp

* Avoid pushing untagged image to GHCR
by setting provenance to false
now that provenance is enabled by default
as of v4 of docker/build-push-action

- docker/build-push-action#781
- docker/build-push-action#778

Author: ruffsl

.github/workflows/update_ci_image.yaml

@@ -37,7 +37,7 @@ jobs:
       trigger: ${{ steps.check.outputs.trigger }}
       no_cache: ${{ steps.check.outputs.no_cache }}
     container:
-      image: ghcr.io/ros-planning/navigation2:${{ github.ref_name }}
+      image: ghcr.io/${{ github.repository }}:${{ github.ref_name }}
     steps:
       - name: "Check apt updates"
         id: check
@@ -74,8 +74,8 @@ jobs:
       - name: Set build config
         id: config
         run: |
-          timestamp=$(date --utc +%Y%m%d%H%M%S)
-          echo "timestamp=${timestamp}" >> $GITHUB_OUTPUT
+          version=$(grep -oP '(?<=<version>).*?(?=</version>)' navigation2/package.xml)
+          echo "version=${version}" >> $GITHUB_OUTPUT
 
           no_cache=false
           if  [ "${{needs.check_ci_files.outputs.no_cache}}" == 'true' ] || \
@@ -97,15 +97,16 @@ jobs:
         id: docker_build
         uses: docker/build-push-action@v4
         with:
+          provenance: false
           pull: true
           push: true
           no-cache: ${{ steps.config.outputs.no_cache }}
-          cache-from: type=registry,ref=ghcr.io/ros-planning/navigation2:${{ github.ref_name }}
+          cache-from: type=registry,ref=ghcr.io/${{ github.repository }}:${{ github.ref_name }}
           cache-to: type=inline
           target: builder
           tags: |
-            ghcr.io/ros-planning/navigation2:${{ github.ref_name }}
-            ghcr.io/ros-planning/navigation2:${{ github.ref_name }}-${{ steps.config.outputs.timestamp }}
+            ghcr.io/${{ github.repository }}:${{ github.ref_name }}
+            ghcr.io/${{ github.repository }}:${{ github.ref_name }}-${{ steps.config.outputs.version }}
       - name: Image digest
         if: steps.config.outputs.trigger == 'true'
         run: echo ${{ steps.docker_build.outputs.digest }}