Notify once per workflow run, failures always and successes on master, so every repo reports the same way

README.md

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+# ci-notify
+
+One ntfy notification per workflow run. Add it as the last job, needing every
+other job: a failed job posts to `errors` (priority 5), and a run where
+everything passed on `master` posts to `gitea-releases`. Each notification
+links to the run. Other branches only report failures, so a feature branch push
+stays quiet.
+
+```yaml
+  notify:
+    needs: [test, build-master, deploy-master]
+    if: always()
+    runs-on: go-executor
+    steps:
+      - uses: https://lab.zlymeda.dynu.net/actions/ci-notify@master
+        with:
+          needs: ${{ toJSON(needs) }}
+          ntfy_token: ${{ secrets.NTFY_TOKEN }}
+```
+
+`success_branches` widens what is announced (e.g. `master develop`), and the
+topics and tokens can be overridden.