update readme

README.md

@@ -32,7 +32,7 @@ git clone https://github.com/GoAdminGroup/example.git
 
 ```shell
 cd example
-GO111MODULE=on go run main.go
+GO111MODULE=on go run .
 ```
 
 visit: [http://localhost:9033/admin](http://localhost:9033/admin)
@@ -64,7 +64,7 @@ govendor sync
 ### step 3
 
 ```shell
-go run main.go
+go run .
 ```
 
 visit: [http://localhost:9033/admin](http://localhost:9033/admin)
@@ -87,7 +87,7 @@ docker build -t go-admin-example .
 ### step 3
 
 ```shell
-docker attach $(docker run -p 9033:9033 -it -d go-admin-example /bin/bash -c "cd /go/src/app && GOPROXY=http://goproxy.cn GO111MODULE=on go run main.go")
+docker attach $(docker run -p 9033:9033 -it -d go-admin-example /bin/bash -c "cd /go/src/app && GOPROXY=http://goproxy.cn GO111MODULE=on go run .")
 ```
 
 visit: [http://localhost:9033/admin](http://localhost:9033/admin)