Trigger redeploy after image push

- Add deploy job to docker workflow: POST redeploy webhook once the image is pushed (fixes push-webhook race)

- README: fix CI/CD tag docs

.gitea/workflows/docker.yaml

@@ -75,3 +75,13 @@ jobs:
                   push: true
                   tags: ${{ steps.meta.outputs.tags }}
                   labels: ${{ steps.meta.outputs.labels }}
+
+    deploy:
+        name: Trigger Deploy
+        needs: image
+        if: github.ref == 'refs/heads/main'
+        runs-on: ubuntu-latest
+        steps:
+            - name: Trigger Deploy
+              run: |
+                  curl --fail -X POST "${{ secrets.WEBHOOK_URL }}"