server.js

const SwaggerExpress = require('swagger-express-mw');
const app = require('express')();
const mongoose = require('mongoose');

const apiConfig = require('./api/config/config');

// Export the express app for testing purposes
module.exports = app;

const swaggerConfig = {
  swaggerFile: `${__dirname}/api/controllers/swagger/swagger.yaml`,
  configDir: `${__dirname}/api/config/swagger`,
  appRoot: __dirname,
};

// Establish the connection with the database
mongoose.connect('mongodb://127.0.0.1:27017/node_swagger_api_db', (error) => {
  if (error) {
    throw Error('Error establishing a connection to the database');
  }
});

SwaggerExpress.create(swaggerConfig, (err, swagger) => {
  if (err) {
    throw err;
  }
  swagger.register(app);
  app.listen(apiConfig.port);
});