Chart configuration

site.js

window.onload = function () {
  var ctx = document.getElementById('chartCanvas').getContext('2d');

  window.myChart = new Chart(ctx, {
    type: 'line',
    data: {
      datasets: [{
        label: 'Speed',
        data: []
      }]
    },
    options: {
      scales: {
        xAxes: [{
          type: 'realtime',
          delay: 0,
          // 20 seconds of data
          duration: 20000
        }],
        yAxes: [{
          ticks: {
            suggestedMin: 0,
            suggestedMax: 50
          }
        }]
      }
    }
  });
  
  // The other signalr setup is still here...
}