Environment variables in Node.js. The Right way!

{
  "name": "@my-org/bar",
  "version": "1.0.0",
  "description": "A test package to be published on my private Gitlab instance",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "Arman Safikhani",
  "license": "ISC"
}

{
    ...
    "scripts": {
        "start": "NODE_ENV=production node bin/www.js"
    }
    ...
}

{
  "name": "mevn",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node -r dotenv/config ./bin/www",
    "dev:serve": "nodemon -r dotenv/config ./bin/www",
    "dev:client": "webpack-dev-server --port 3000 --open --inline --hot --content-base ./views",
    "build": "webpack --progress --hide-modules",
    "static": "npm run build && npm run dev:serve"
  },
  "dependencies": {
    "axios": "^0.17.0",
    "body-parser": "~1.18.2",
    "cookie-parser": "~1.4.3",
    "cors": "^2.8.4",
    "debug": "~2.6.9",
    "dotenv": "^4.0.0",
    "express": "^4.16.3",
    "mongoose": "^4.12.3",
    "nodemon": "^1.17.5",
    "serve-favicon": "~2.4.5",
    "trunks-log": "^2.0.2",
    "vue": "^2.5.2",
    "vue-router": "^3.0.1",
    "vuetify": "^1.0.19"
  },
  "devDependencies": {
    "babel-core": "^6.26.3",
    "babel-loader": "^7.1.2",
    "babel-preset-env": "^1.7.0",
    "babel-preset-stage-2": "^6.24.1",
    "cross-env": "^5.0.5",
    "css-loader": "^0.28.7",
    "file-loader": "^1.1.4",
    "npm-run-all": "^4.1.1",
    "style-loader": "^0.13.1",
    "stylus": "^0.54.5",
    "stylus-loader": "^3.0.1",
    "vue-loader": "^13.0.5",
    "vue-template-compiler": "^2.4.4",
    "webpack": "^3.6.0",
    "webpack-dev-server": "^2.9.1"
  },
  "eslintConfig": {
    "root": true,
    "extends": "standard"
  }
}