title: How to add a marker on a map on openlayer?
body: <p>I am using openlayer, but I am not able to add a marker with lat/long on the map.
  Could you please point me out in a right direction, below a sample of my code:</p>
  
  <pre><code>let map = new ol.Map({
    target: 'map',
    layers: [
      new ol.layer.Tile({
        source: new ol.source.OSM()
      })
    ],
    view: new ol.View({
      center: ol.proj.transform([37.41, 8.82], 'EPSG:4326', 'EPSG:3857'),
      zoom: 4
    })
  })
  let layerCloud = new ol.layer.Tile({
    source: new ol.source.XYZ({
      url: api.mapTemperature()
    })
  })
  map.addLayer(layerCloud)
  </code></pre>