feat: add production build and health tooling

chfs-ng/cmd/chfs/main.go

@@ -16,7 +16,10 @@ import (
 	"chfs-ng/internal/storage"
 )
 
+var version = "dev"
+
 func main() {
+	showVersion := flag.Bool("version", false, "print version and exit")
 	file := flag.String("file", "", "configuration file")
 	pathFlag := flag.String("path", "/data", "shared path")
 	port := flag.Int("port", 80, "listen port")
@@ -24,6 +27,11 @@ func main() {
 	var rules multiFlag
 	flag.Var(&rules, "rule", "access rule (repeatable)")
 	flag.Parse()
+	if *showVersion {
+		println(version)
+		return
+	}
+	api.Version = version
 
 	cfg := config.Default()
 	if *file != "" {