title: Can't connect to Flask web service, connection refused
body: <p>I'm trying to run a simple web server on a Raspberry Pi with Flask. When I run my Flask app, it says:</p>
  
  <blockquote>
    <p>running on <a href="http://127.0.0.1:5000/" rel="noreferrer">http://127.0.0.1:5000/</a></p>
  </blockquote>
  
  <p>But when I enter this address on my laptop's in Chrome, I get </p>
  
  <blockquote>
    <p>ERR_CONNECTION_REFUSED</p>
  </blockquote>
  
  <p>I can open 127.0.0.1:5000 on the Raspberry Pi's browser. What do I need to do to connect from another computer?</p>