set pipeline condition

.woodpecker.yml

@@ -6,7 +6,10 @@ pipeline:
       - echo ${CI_REPO_NAME}  
       - echo ${CI_REPO_OWNER}  
       - echo ${CI_COMMIT_SHA}
-      - echo ${CI_COMMIT_SHA:0:10}      
+      - echo ${CI_COMMIT_SHA:0:10}   
+    when:
+      event: tag
+      branch: main           
 
   build-push:
     image: plugins/docker
@@ -21,4 +24,7 @@ pipeline:
       username:
         from_secret: docker_username
       password:
-        from_secret: docker_password
+        from_secret: docker_password
+    when:
+      event: tag
+      branch: main