Example routing using expressJS router

routes.js

const express = require('express');
const statusMonitor = require('express-status-monitor')({ path: '' });
const healthcheck = require('express-healthcheck');
const versionCheck = require('version-healthcheck');
const swaggerUi = require('swagger-ui-express');

const ErrorController = require('./controllers/ErrorController');
const SfdcController = require('./controllers/SalesforceController');
const swaggerDocument = require('../swagger.json');
const authService = require('./services/authService');
const logger = require('./utils/logger');

const basicAuth = authService.basic();

/* istanbul ignore next */
const registerDevRoutes = (app) => {
  /* add route if not on test */
  if (process.env.NODE_ENV !== 'test') {
    /* Kue UI */
    require('kue-ui-express')(app, '/kue/', '/kue-api/');
    app.use('/kue-api/', basicAuth, require('kue').app);
  }
  /* Show these endpoints only on development stages */
  if (['development', 'staging'].indexOf(process.env.NODE_ENV) > -1) {
    /* Express server status */
    app.use(statusMonitor.middleware);
    app.get('/status', basicAuth, statusMonitor.pageRoute);
    /* Swagger specs definition */
    app.use(
      '/specs', [
        basicAuth,
        swaggerUi.serve,
      ],
      swaggerUi.setup(swaggerDocument, true, {
        showRequestHeaders: true,
      }),
    );
  }
};

module.exports = (app) => {
  registerDevRoutes(app);
  /* we register morgan here so it only logs the next routes registered */
  app.use(require('morgan')('short', { stream: logger.logStream }));
  const leadsRouter = express.Router();
  const contactsRouter = express.Router();

  /* SFDC APIs */
  leadsRouter.post('/', SfdcController.createLeads);
  leadsRouter.get('/', SfdcController.getLeads);
  leadsRouter.delete('/', SfdcController.deleteLeads);
  leadsRouter.patch('/', SfdcController.updateLeads);
  
  contactsRouter.post('/', SfdcController.createLeads);
  contactsRouter.get('/', SfdcController.getLeads);
  contactsRouter.delete('/', SfdcController.deleteLeads);
  contactsRouter.patch('/contacts', SfdcController.updateLeads);

  /* APIs */
  app.use('/api/leads', authService.bearer, leadsRouter);
  app.use('/api/contacts', authService.bearer, contactsRouter);

  /* Sanity & version checks */
  app.use('/healthcheck', healthcheck());
  app.get('/version', versionCheck);

  /* Error Handling */
  app.use(ErrorController.error404);
  app.use(ErrorController.generalError);
};

/* in your index.js */
const app = express();
app.server = http.createServer(app);

/* register routes */
routes(app);
/* istanbul ignore next */
app.server.listen(PORT || 8080, () => {
  logger.info(`ENV[${NODE_ENV}] Started on port ${app.server.address().port}`);
});