.js

const config = require('./config.json')

let url = `amqp://${config.AMQP_USER}:${config.AMQP_PASS}@${config.AMQP_HOST}:${config.AMQP_PORT}`;

let rabbitMQDetails = {
  url: url,
  exchange: config.AMQP_SEND_EXCHANGE,
  exchangeType: config.AMQP_TOPIC,
  routingKey: '',
};

config.json

{
  "AMQP_HOST": "http://testing.com",
  "AMQP_PORT": "80",
  "AMQP_USER": "foo",
  "AMQP_PASS": "bar",
  "AMQP_SEND_EXCHANGE": "something goes here",
  "AMQP_TOPIC": "something else"
}