feat: add qrcode output

README.md

@@ -9,6 +9,9 @@ Transfer and browse files as simple as possiable via HTTP. Supported Windows, Li
 
 # Usage
 1. Download the binary from the [release page](https://github.com/sssvip/simple-file-server/releases), choose your os relational edition
+
+
+   国内加速便捷下载地址: [Windows](http://down.dxscx.com/simple-file-server_0.1.1_windows_amd64.tar.gz)        [Linux](http://down.dxscx.com/simple-file-server_0.1.1_linux_amd64.tar.gz)         [Mac](http://down.dxscx.com/simple-file-server_0.1.1_darwin_amd64.tar.gz) 
 
 2. Put the binary to you want transfer or browse folder
 
@@ -33,6 +36,7 @@ Transfer and browse files as simple as possiable via HTTP. Supported Windows, Li
 
         > simplefileserver.exe 8080
         $ ./simplefileserver 8080
+
         
 4. [New Option] Show the url qrcode in the terminal.(Windows default window not support now)