move mapbox token to config file

.gitignore

@@ -21,3 +21,5 @@
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+
+/src/config/*

src/Mapbox.js

@@ -8,8 +8,8 @@ import {
   GeolocateControl
 } from "react-map-gl";
 import "./css/maps.css";
+import mapboxToken from './config/mapboxToken.js';
 
-const MAPBOX_TOKEN = "";
 const ICON = `M20.2,15.7L20.2,15.7c1.1-1.6,1.8-3.6,1.8-5.7c0-5.6-4.5-10-10-10S2,4.5,2,10c0,2,0.6,3.9,1.6,5.4c0,0.1,0.1,0.2,0.2,0.3
   c0,0,0.1,0.1,0.1,0.2c0.2,0.3,0.4,0.6,0.7,0.9c2.6,3.1,7.4,7.6,7.4,7.6s4.8-4.5,7.4-7.5c0.2-0.3,0.5-0.6,0.7-0.9
   C20.1,15.8,20.2,15.8,20.2,15.7z`;
@@ -34,7 +34,7 @@ export default class Mapbox extends React.Component{
       <ReactMapGL
         {...this.state.viewport}
         onViewportChange={(viewport) => this.setState({viewport})}
-        mapboxApiAccessToken={MAPBOX_TOKEN}
+        mapboxApiAccessToken={mapboxToken}
         mapStyle="mapbox://styles/mapbox/streets-v11"
       >
         <Marker