pipeline ref

.drone.yml

@@ -10,8 +10,11 @@ steps:
       auto_tag: true
       dry_run: true
     when:
-      event:
+      ref:
-        - pull_request
+        - refs/pull/**
+      # event no anda (?)
+      # event:
+      #   - pull_request
 
   - name: build and publish image
     image: plugins/docker