fix: improve error handling and test robustness

- Add error handling to the `router.Run()` call in `example.go` with a panic if an error occurs

Signed-off-by: Bo-Yi Wu <[email protected]>

Author: appleboy

_examples/example.go

@@ -25,5 +25,8 @@ func main() {
 		},
 		MaxAge: 12 * time.Hour,
 	}))
-	router.Run()
+
+	if err := router.Run(); err != nil {
+		panic(err)
+	}
 }