Update pipeline syntax!

.woodpecker/.build.yml

@@ -1,6 +1,6 @@
-pipeline:
+steps:
   build_and_deploy:
-    image: alpine:3.14
+    image: alpine:3
     secrets: [docker_password, docker_username, runner_private_key]
     commands:
       - apk add --no-cache openssh docker docker-compose jq
@@ -23,4 +23,5 @@ pipeline:
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
 
-branches: main
+when:
+  branch: main