Json problem to load data into the Gmaps api

Question

I’m using Rails on a college project and added to Gmaps API to my project, in which I intend to display several points on the map picking the coordinates of a file JSON to create the cluster.

However the function I did does not work in any way, the map appears but without any point placed in it, I am also using the library jQuery. My file JSON is inside my briefcase Javascripts in the Rails, follows below my code:

<div id="map"></div>
    <script type= "text/javascript">
        //Opções de iniciação do mapa

        function initMap() {
            var cin = {lat: -8.055590, lng: -34.951344}
            var map = new google.maps.Map(document.getElementById('map'), {
            zoom: 10,
            center: cin
        });


        //Função de carregar pontos do Json e jogar no mapa

        function carregarPontos() {
          $.getJSON('javascripts/pontos.json', function(pontos) {
             for (var i = 0; i < pontos.points.length; i++){
             var latLng = new google.maps.LatLng(pontos.points[i][0], pontos.points[i][1]);
             var marker = new google.maps.Marker({
             position: latLng,
             map: map
               });
            }

          });
        }

        //Infoboxes 

        var contentString = '<h1 id="pintest">Teste</h1>';
        var infowindow = new google.maps.InfoWindow({
            content: contentString
        });
            marker.addListener('click', function() {
                 infowindow.open(map, marker);
         });

        }
        //Iniciando função de carregar pontos

        carregarPontos();

My file Points.json is in this format:

I’m not sure if it’s in the right format, but I did the test with another file JSON that is in that format:

And also does not rotate, my map appears but without any point in it.