Given a project has following structure:

root/  client/  server/    models/    routes/    app.js    logger.js    index.js  index.js 

As far as I know a project generally have following concerns:

1. Logging
2. Configuration
3. Database
4. Application code

Now, given below the code for the server/index.js

'use strict';  if (parseFloat(process.versions.node) < 7.6) {   console.log('Please download node version 7.6 or greater.');   process.exit(); }  process.on('SIGTERM', async () => {   const exitCode = await stop();   process.exit(exitCode); });  const promisify = require('es6-promisify'); const open = require('open');  require('dotenv').config();  const config = require('./config'); const logger = require('./logger'); const models = require('./models'); const app = require('./app');  // do not init the process if a crucial component can not start up const initModels = models.init; const initServer = promisify(app.listen, app); async function init () {   try {     await initModels(config.database);     logger.info('Connected to database');   } catch (err) {     logger.error(`Error connecting database: $  {err.message}`);     process.exit();   }    try {     await initServer(config.port);   } catch (err) {     logger.error(`Couldn't init the app: $  {err}`);     // exit code for fatal exception     process.exit(1);   }   logger.appStarted(config.host, app.address().port);   //open(`$  {config.host}:$  {config.port}`); }  const closeModels = models.close(); const closeServer = promisify(app.close, app); async function stop () {   // start with a normal exit code   let exitCode = 0;   try {     await closeModels();     logger.info(`Closed database connection`);   } catch (err) {     logger.error(`Failed to close database connection: $  {err.message}`);   }    try {     await closeServer();   } catch (err) {     logger.error(`Failed to close the app: $  {err}`);     exitCode = 1;   }   return exitCode; }  module.exports = {   init,   stop }; 

By reading the above code, can we say that it uses proper abstractions? if not, which part of the code should be moved and where?