restrict to pushes on master [no ci]

eddelbuettel · eddelbuettel · commit 3bb758db4fc3 · 2021-10-02T13:07:50.000-05:00
diff --git a/.github/workflows/docker.yaml b/.github/workflows/docker.yaml
@@ -2,6 +2,8 @@ name: docker
 
 on:
   push:
+    branches:
+      - master
   schedule:
   - cron: "32 1 * * 6"
 
