Correct hello world example

The hello world example won't really run the server, shouldn't it be like this? Also the instruction below don't mention the /hello route so I removed it to simplify.

README.md

@@ -53,15 +53,16 @@ package main
 
 import (
 	"net/http"
-
 	"github.com/labstack/echo"
+	"github.com/labstack/echo/engine/standard"
 )
 
 func main() {
 	e := echo.New()
-	e.Get("/hello", func(c echo.Context) error {
+	e.Get("/", func(c echo.Context) error {
 		return c.String(http.StatusOK, "Hello, World!")
 	})
+	e.Run(standard.New(":1323"))
 }
 ```