refactring & config object

src/db/database.js

@@ -1,3 +1,6 @@
+const env = process.env.NODE_ENV || 'development';
+const config = require(__dirname + '/../../config/config.json')[env];
+
 
 const Sequelize = require("sequelize");
 const mongoose = require('mongoose');
@@ -14,7 +17,7 @@ let DevicesSchema = new Schema({
 });
 
 
-var sqlz = new Sequelize('iot', 'iot', '!iot_popovi',{dialect: 'mysql', logging: false});
+var sqlz = new Sequelize(config.database, config.username, config.password,{dialect: config.dialect, logging: false});
 var Device = sqlz.define('device', {
   id: { type: Sequelize.INTEGER, autoIncrement: true, primaryKey: true },
   name: Sequelize.STRING,