codeigniterの初期設定

前提・実現したいこと

ここに質問の内容を詳しく書いてください。
以下のサイトを参考にcodeigniterの初期設定をしています。
https://deep-blog.jp/engineer/6828/
トップページの表示ができません。

/Applications/config/config.phpの'http://example.com/';にアクセスしてトップページが表示されるようにしたい。

発生している問題・エラーメッセージ

Example Domain
This domain is established to be used for illustrative examples in documents. You may use this domain in examples without prior coordination or asking for permission.

該当のソースコード

config.php
1<?php
2defined('BASEPATH') OR exit('No direct script access allowed');
3
4/*
5|--------------------------------------------------------------------------
6| Base Site URL
7|--------------------------------------------------------------------------
8|
9| URL to your CodeIgniter root. Typically this will be your base URL,
10| WITH a trailing slash:
11|
12|	http://example.com/
13|
14| WARNING: You MUST set this value!
15|
16| If it is not set, then CodeIgniter will try guess the protocol and path
17| your installation, but due to security concerns the hostname will be set
18| to $_SERVER['SERVER_ADDR'] if available, or localhost otherwise.
19| The auto-detection mechanism exists only for convenience during
20| development and MUST NOT be used in production!
21|
22| If you need to allow multiple domains, remember that this file is still
23| a PHP script and you can easily do that on your own.
24|
25*/
26$config['base_url'] = 'http://example.com/';
27
28