PostsUpdate done

main.go

@@ -15,7 +15,9 @@ func main() {
 	r := gin.Default()
 
 	r.POST("/posts", controllers.PostsCreate)
+	r.PUT("/posts/:id", controllers.PostsUpdate)
 	r.GET("/posts", controllers.PostsIndex)
+	r.GET("/posts/:id", controllers.PostsShow)
 
 	r.Run() // listen and serve on 0.0.0.0:8080 (for windows "localhost:8080")
 }