Configuring json-server to expose static files, in addition to API endpoints

data.json

{
  "notifications": [
    {
      "id": 1,
      "message": "Message",
      "date": "2020-02-03T14:09:52.587Z"
    },
    {
      "id": 2,
      "message": "Message 2",
      "date": "2020-02-03T14:09:52.587Z"
    }
  ]
}

server.js

const jsonServer = require('json-server');
const server = jsonServer.create();
const router = jsonServer.router('data.json');
const middlewares = jsonServer.defaults({ static: 'src/assets' });
const port = process.env.PORT || 3000;

server.use((req, res, next) => setTimeout(next, 500));

server.use(middlewares);
server.use(router);

server.listen(port, function() {
  console.log('JSON Server is running on http://localhost:' + port);
});