ping watchtower after build

Author: splitbrain

.github/workflows/docker-build.yml

@@ -41,7 +41,7 @@ jobs:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
-          
+
       - name: Log in to Docker Hub
         uses: docker/login-action@v3
         with:
@@ -72,3 +72,9 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
+
+      - name: Ping Watchtower
+        if: secrets.WATCHTOWER_HTTP_API_URL && secrets.WATCHTOWER_HTTP_API_TOKEN
+        run: |
+          curl --fail -X POST ${{ secrets.WATCHTOWER_HTTP_API_URL }} \
+          -H "Authorization: Bearer ${{ secrets.WATCHTOWER_HTTP_API_TOKEN }}"