Update README.md

Signed-off-by: NAcmefocus <107723772@qq.com>

README.md

@@ -12,6 +12,15 @@ It is inspired by Tornado, Sinatra and Flask. beego has some Go-specific feature
 
     go get github.com/astaxie/beego
 
+#### Create hello directory 
+
+   sudo mkdir hello
+   cd hello
+   
+#### Init module
+
+  go mod init
+
 #### Create file `hello.go`
 ```go
 package main