const app = require('./app'); require('dotenv').config({ path: process.env.NODE_ENV === 'production' ? '.env.production' : '.env' }); const dbConfigs = require('./config/config'); const env = process.env.NODE_ENV || 'development'; const config = dbConfigs[env]; // set port, listen for requests const PORT = process.env.PORT || 8080; app.listen(PORT, () => { console.log(`Server is running on port ${PORT} in ${process.env.NODE_ENV} mode.`); });