update:优化二维码长度

QRCodeService/Services/IShortCodeService.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace QRCodeService.Services
+{
+    public interface IShortCodeService
+    {
+        Task<string> GenShortCode(string url);
+    }
+}