title: Flask request without port in url
body: <p>I have an ubuntu EC2 server and want to run a flask server.  I want to hit the server using my domain name, api.example.com, without having to include the port number.  Right now, I can successfully access the server by doing api.example.com:5000/... but I can't figure out how to do api.example.com/.... </p>
  
  <p>Right now I'm just running the flask server directly, using python flask_server.py.</p>
  
  <p>In flask_server.py:</p>
  
  <pre><code>if __name__ == '__main__':
      app.run(host=0.0.0.0)
  </code></pre>