Update 'README.md'

README.md

@@ -1,3 +1,23 @@
 # ossutil
 
-阿里oss云存储命令行工具
+阿里oss云存储命令行工具，支持 windows，linux
+
+
+## Usage
+
+```
+./ossutil config
+
+./ossutil cp localfile oss://bucket
+
+# 错误
+ossutil cp -rf build/app/outputs/flutter-apk/**/*.apk oss://yoqi-software/develop/flutter_cocktail/20231111-3f7239b/
+
+```
+
+
+## Develop
+
+```
+go build
+```