Simple Leaflet with CartoDB tiles

<!DOCTYPE html>
<html>
<head>
    <title>Leaflet GeoJSON Example</title>
    <meta charset="utf-8">
    <meta content="width=device-width, initial-scale=1.0" name="viewport">
    <link href="https://cdn.leafletjs.com/leaflet-0.7/leaflet.css" rel="stylesheet">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7/leaflet.min.js"></script>
    <style>
	html, body, #map {
		height:100%;
		width:100%;
		padding:0px;
		margin:0px;
    }
    </style>
</head>

<body>
    <div id="map"></div>
	
    <script>
    var map = L.map('map').setView([38, -96], 5);

L.tileLayer('https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png', {
            maxZoom: 5,
            minZoom: 5
        }).addTo(map);

var points = new L.geoJson();
        points.addTo(map);

$.ajax({
            dataType: "json",
            url: "temp.geojson",
            success: function(data) {
                $(data.features).each(function(key, data) {
                    points.addData(data);
                });
            }
        }).error(function() {});

</script>
</body>
</html>

Modified http://cdn.leafletjs.com/leaflet-0.7/leaflet.js to a secure url

https://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js

https://cdn.leafletjs.com/leaflet-0.7/leaflet.js