add version flag to cli command

cmd/showbridge/.goreleaser.yaml

@@ -14,6 +14,8 @@ builds:
     goarch:
       - "amd64"
       - "arm64"
+    ldflags:
+      - '-s -w -X main.version={{.Version}}'
 
 archives:
   - formats: [tar.gz]

cmd/showbridge/main.go

@@ -13,9 +13,14 @@ import (
 	"sigs.k8s.io/yaml"
 )
 
+var (
+	version = "dev"
+)
+
 func main() {
 	cmd := &cli.Command{
-		Name: "showbridge",
+		Name:    "showbridge",
+		Version: version,
 		Flags: []cli.Flag{
 			&cli.StringFlag{
 				Name:  "config",