added email notification

.gitea/workflows/build.yaml

@@ -40,3 +40,14 @@ jobs:
           tags: | # replace it with your local IP and tags
             harbor.solusar.de/library/${{ steps.meta.outputs.REPO_NAME }}:${{ steps.meta.outputs.REPO_VERSION }}
             harbor.solusar.de/library/${{ steps.meta.outputs.REPO_NAME }}:${{ env.DOCKER_LATEST }}
+      - name: Send mail
+        if: always()
+        uses: https://github.com/dawidd6/action-send-mail@v3
+        with:
+            to: ${{ secrets.MAIL_TO }}
+            from: Gitea <gitea@hostname>
+            subject: ${{ gitea.repository }} ${{gitea.workflow}} ${{ job.status }}
+            priority: high
+            convert_markdown: true
+            html_body: |
+                ### Job ${{ job.status }}