simple nodejs config example

app.js

var config=require('./config.json')[process.env.NODE_ENV || 'production'];

console.log(config.db.hosts)
console.log(config.redis.hosts)

config.js

module.exports = {
   "dev": {
        "db": {
            "hosts":["localhost"],
            "database": "api"
        },
        "redis": {
            "hosts": ["localhost"]
        }
   },
   "staging": {
        "db": {
            "hosts":["1.1.1.1"],
            "database": "api"
        },
        "redis": {
            "hosts": ["2.2.2.2"]
        }
   },
   "production": {
        "db": {
            // Gets comma seperated hosts from environment, otherwise default to 1.1.1.1
            "hosts": (proccess.env.DB_HOSTS.split(",") || "1.1.1.1"),
            "database": "api"
        },
        "redis": {
            // Get redis hosts from env, otherwise default to 2.2.2.2 and 2.2.2.3
            "hosts": (proccess.env.DB_HOSTS.split(",") || "2.2.2.2,2.2.2.3")
        }
   }
}