small fix

cmd/file-server/main.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"net/http"
+	"os"
+
+	"file-server/internal/handler"
+)
+
+var port uint
+var folderPath string
+
+func init() {
+	flag.StringVar(&folderPath, "p", "", "Path to folder (required)")
+	flag.UintVar(&port, "l", 8080, "Listening port (default 8080)")
+	flag.Parse()
+}
+
+func main() {
+	if folderPath == "" {
+		fmt.Fprintf(os.Stderr, "Error: parametr 'path' is required")
+		os.Exit(1)
+	}
+
+	server := &http.Server{
+		Addr:    fmt.Sprintf(":%d", port),
+		Handler: handler.NewHandler(folderPath),
+	}
+
+	err := server.ListenAndServe()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error: %v", err)
+
+		os.Exit(1)
+	}
+}