Update pipeline with Go code review (#25)

Reviewed-on: https://codeberg.org/woodpecker-plugins/go-plugin/pulls/25
Co-authored-by: Lauris BH <lauris@nix.lv>
Co-committed-by: Lauris BH <lauris@nix.lv>

.woodpecker.yaml

@@ -7,15 +7,27 @@ when:
 
 variables:
   - &golang "golang:1.22"
+  - &golangci-lint "golangci/golangci-lint:v1.57-alpine"
+  - &reviewdog-golangci-lint "woodpeckerci/plugin-reviewdog-golangci-lint:1.57"
 
 steps:
   vendor:
     image: *golang
     commands: go mod vendor
 
+  review-go:
+    image: *reviewdog-golangci-lint
+    settings:
+      token:
+        from_secret: reviewdog_token
+    when:
+      event: pull_request
+
   lint:
-    image: golangci/golangci-lint:v1.56-alpine
+    image: *golangci-lint
     commands: golangci-lint run
+    when:
+      event: [push, tag, cron]
 
   test:
     image: *golang

plugin.go

@@ -58,6 +58,7 @@ func New(opt Options) *Plugin {
 
 	app := &cli.App{
 		Name:        opt.Name,
+		Usage:       "Run the Woodpecker CI plugin",
 		Description: opt.Description,
 		Version:     opt.Version,
 		Flags:       append(opt.Flags, Flags()...),