let sequelize =
  process.env.NODE_ENV === 'production' ?
    new Sequelize({
      database: DB_NAME,
      dialect: 'postgres',
      host: DB_HOST,
      port: PGPORT,
      username: DB_USER,
      password: DB_PASSWORD,
      pool: {
        max: 3,
        min: 1,
        idle: 10000
      },
      dialectOptions: {
        ssl: {
          require: true,
          rejectUnauthorized: false,
        },
        keepAlive: true
      },
      ssl: true
    })
    : new Sequelize(`postgres://${DB_USER}:${DB_PASSWORD}@${DB_HOST}/${DB_NAME}`, {
      logging: false, // set to console.log to see the raw SQL queries
      native: false, // lets Sequelize know we can use pg-native for ~30% more speed
    });