First more or less working version

Signed-off-by: Nikolai Rodionov <iam@allanger.xyz>

.woodpecker/publish-tagged-helm-chart.yaml

@@ -1,7 +1,10 @@
 ---
 when:
   event:
-    - tag
+    - pull_request
+  branch:
+    include:
+      - main
 
 steps:
   - name: Build and push helm charts