title: shows err_connection_timed_out when I try to see my react app on mobile
body: <p>I want to test my react app on my smartphone.</p>
  <p>I am not using react native because I haven't learned that yet.</p>
  <p><a href="https://i.stack.imgur.com/yD8bS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/yD8bS.png" alt="enter image description here" /></a></p>
  <p>As you see, port number is 8080.</p>
  <p>What I tried to run my app on mobile:</p>
  <p>tried iconfig in terminal and got my IPv4 address.</p>
  <p><a href="https://i.stack.imgur.com/hJMl3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/hJMl3.png" alt="enter image description here" /></a></p>
  <p>after that, typed my ipv4 address:8080 in my mobile chrome browser.
  Something like that:</p>
  <p>192.1xx.x.xxx:8080</p>
  <p>but shows err_connection_timed_out error.</p>
  <p>On the other hand, I can connect to 192.1xx.x.xxx/dashboard. It works fine.</p>
  <p>Can't understand why I can't run my react app on my mobile browser if I can connect to xampp dashboard.</p>
  <p>And of course, my smartphone and pc are using same wifi.</p>