How to build a database connection inside dashboard-template-node

Dashboard
,
5

I actually found this site and got my ajax connection done. I set up the table for progressive loading but the data isnt showing up. (Because it's not retrieving an array)

The data looks like the following:

{"payload":[{"Register":1,"Druck":59,"Zeitstempel":"13:37:41:967"},{"Register":2,"Druck":59,"Zeitstempel":"13:37:41:967"},{"Register":3,"Druck":59,"Zeitstempel":"13:37:41:967"},{"Register":4,"Druck":59,"Zeitstempel":"13:37:41:967"},{"Register":5,"Druck":59,"Zeitstempel":"13:37:41:967"},{"Register":6,"Druck":59,"Zeitstempel":"13:37:41:967"},{"Register":7,"Druck":59,"Zeitstempel":"13:37:41:967"},{"Register":8,"Druck":59,"Zeitstempel":"13:37:41:967"},{"Register":9,"Druck":59,"Zeitstempel":"13:37:41:967"},{"Register":10,"Druck":59,"Zeitstempel":"13:37:41:967"},{"Register":11,"Druck":59,"Zeitstempel":"13:37:41:967"},{"Register":12,"Druck":59,"Zeitstempel":"13:37:41:967"},{"Register":13,"Druck":59,"Zeitstempel":"13:37:41:967"},{"Register":14,"Druck":59,"Zeitstempel":"13:37:41:967"},{"Register":15,"Druck":59,"Zeitstempel":"13:37:41:967"},{"Register":16,"Druck":59,"Zeitstempel":"13:37:41:967"}]}

I think I have to change something inside the server file..

var express = require('express')
var path = require('path')
var createError = require('http-errors')
var cors = require('cors')
var bodyParser = require('body-parser')
var app = express()

var dbMySQLNode = require('./database')
// view engine setup
app.set('views', path.join(__dirname, '/'))
app.set('view engine', 'ejs')
app.use(bodyParser.json())
app.use(
  bodyParser.urlencoded({
    extended: true,
  }),
)

app.use(cors())
app.get('/', (req, res) => {
  res.render('index')
})
app.get('/fetch-countries', function (req, res) {
  dbMySQLNode.query('SELECT * FROM Country ORDER BY id desc', function (
    error,
    response,
  ) {
    if (error) {
      res.json({
        msg: error,
      })
    } else {
      res.json({
        msg: 'Data successfully fetched',
        country: response,
      })
    }
  })
})
app.listen(5555, function () {
  console.log('Node app is being served on port: 5555')
})
module.exports = app

But I have no clue about express or body-parser...