How to get data from DB without restarting the server?

Question

MySQL

In short, I'm creating a simple chat in which:
1) the user enters text, submit.
2) the socket writes to the database what the client entered and returns the same
3) when refreshing the page , the records that were sent earlier should be
written 4) and I have to restart the server (ctrl + c / node app) so that the records appear
Template

<div class="form">
      <form action="">
        <input class="m" type="text" placeholder="Введите сообщение...">
        <button class="send" type="submit">Отправить</button>
      </form>
    </div>

    <div class="sms">
      <h3>
        <% for (var i = 0; i < smsText.length; i++) { %>
                <p><%= smsText[i].text %></p>
            <% } %>
      </h3>
    </div>
  </div>
</div>

<script src="/socket.io/socket.io.js"></script>
<script src="https://code.jquery.com/jquery-1.11.1.js"></script>
<script>
<code lang="javascript">
  $(function () {
    var socket = io();

    $('form').submit((e) => {
        e.preventDefault();
        socket.emit('chat message', $('.m').val());
        $('.m').val('');
        return false;
      });

      socket.on('chat message', function(msg){
      	$('.sms').append($('<li>').text(msg));
      });
    });
</code>
</script>

app.js

// Chat
var reqDB = 'SELECT * FROM messages';

db.query(reqDB, (err, result) => {
  if (err) throw err;

  for(let i=0; i < result.length; i++){
    result[i].text;
  }

  // Chat render
  app.get('/chat', function (req, res) {
    res.render('chat', {
      smsText: result
    });
  });
});

// Socket Connect
io.on('connection', function (socket) {
  console.log('Socket Run...')

  // Send sms
  socket.on('chat message', function(msg, cl){

    let sql = `INSERT INTO messages (id, text) VALUES (NULL, '${msg}')`;

    db.query(sql, (err, result) => {
      if (err) throw err;
      console.log(result);
      console.log('SMS send! YES!!!');
    })

    io.emit('chat message', msg);
  });

  // Disconnect
  socket.on('disconnect', function(){
    console.log('Socket STOP!');
  });
});