Make a config.json in root directory. Sample JSON is as follows.

{
    "MONGO_HOST": "<MONGO_HOST>",
    "USERNAME": "<USERNAME>",
    "PASSWORD": "<PASSWORD>",
    "NAME": "<NAME_OF_DATABASE>",
    "RMQ_URL": "<RMQ_URL>",
    "RMQ_QUEUE": "<QUEUE_NAME>",
    "RMQ_EXCHANGE": "<EXCHANGE_NAME>",
    "ROUTING_KEY": "<ROUTING_KEY_FOR_EXCHANGE>"
}