add build step for branches

.woodpecker.yml

@@ -6,6 +6,17 @@
       depth: 15
 
 steps:
+  test:
+    image: docker
+    commands:
+      - apk add curl
+      - docker build .
+    when:
+      branch:
+        exclude: ["master", "main"]
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+
   build:
     image: docker
     commands:
@@ -17,6 +28,7 @@ steps:
       - 'curl http://100.113.98.36:4000/api/update -H "Authorization: Bearer $COMPOSE_TOKEN"'
     secrets: [docker_username, docker_password, compose_token]
     when:
-      branch: "master"
+      branch:
+        include: ["master", "main"]
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock