linting and formatting

.woodpecker/build.yaml

@@ -1,5 +1,5 @@
 when:
-  - event: push
+  - event: [push, pull_request]
     branch: main
 
 steps:

.woodpecker/lint.yaml

@@ -0,0 +1,9 @@
+when:
+  - event: [push, pull_request]
+    branch: main
+
+steps:
+  - name: build
+    image: golangci-lint
+    commands:
+      - golangci-lint run

.woodpecker/test.yaml

@@ -1,5 +1,5 @@
 when:
-  - event: push
+  - event: [push, pull_request]
     branch: main
 
 # go again
@@ -13,3 +13,6 @@ steps:
     commands:
       - go get ./...
       - go test ./... -v
+
+depends_on:
+  - build