feat(ci): add comment with image ref

.github/workflows/ci.yaml

@@ -46,19 +46,32 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Log in to GitHub Container Registry
-        if: ${{ github.event.label.name == 'build' }}
+        if: ${{ contains( github.event.pull_request.labels.*.name, 'build')  }}
         run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
 
       - name: Build and push to ghcr
-        if: ${{ github.event.label.name == 'build' }}
+        if: ${{ contains( github.event.pull_request.labels.*.name, 'build')  }}
         run: |
           TAG="pr-${{ github.event.pull_request.number }}-$(git rev-parse --short HEAD)"
+          echo "TAG=${TAG}" >> $GITHUB_ENV
           docker build -t ghcr.io/camptocamp/pg253:${TAG} \
             --pull --no-cache \
             --label GIT_COMMIT=$(git rev-parse HEAD) .
           docker push ghcr.io/camptocamp/pg253:${TAG}
 
+      - uses: actions/github-script@v7
+        if: ${{ contains( github.event.pull_request.labels.*.name, 'build')  }}
+        with:
+          github-token: ${{secrets.GITHUB_TOKEN}}
+          script: |
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: "A docker image was successfully build for your Pull Request: `ghcr.io/camptocamp/pg253:${TAG}`"
+            })
+
       - name: Build only
-        if: ${{ github.event.label.name != 'build' }}
+        if: ${{ not contains( github.event.pull_request.labels.*.name, 'build')  }}
         run: |
           docker build --pull --no-cache .