$ git clone [email protected]:wakayama-hacker/latlng.git
$ cd latlng
$ npm install
$ npm run build
$ npm start

{
  "lat": "35.7090",
  "lng": "139.7320",
  "zoom": "5",
  "layers": [
    {
      "name": "Open Street Map",
      "tile": "https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png",
      "attribution": "OpenStreetMap Contributers",
      "attribution_url": "http://osm.org/copyright"
    },
  ]
}