@xuing #41 一分钟写个 clash

```
package main

import (
"net/http"
"github.com/gin-gonic/gin"
)

func main() {
r := gin.Default()
r.Use(func(c *gin.Context) {
c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
c.Next()
})
r.GET("/version", func(c *gin.Context) {
c.JSON( http.StatusOK, gin.H{"version": "1.0.0"})
})
r.NoRoute(func(c *gin.Context) {
c.JSON( http.StatusUnauthorized, gin.H{"message": "Unauthorized"})
})
r.Run(":8000")
}
```