config/resolveConfig.js

const env = process.env.NODE_ENV

const loadConfigFile = (filePath) => {
  try {
    const file = require(filePath)
    console.info('INFO: loading config', filePath)
    return file
  } catch (e) {
    console.info('INFO: loading local config by default')
    return require('./local.js')
  }
}

module.exports = loadConfigFile(`./${env}.js`)