create-queue.js

// import opq
const Queue = require('opq');

// below we create a new client to the queue, 
// and create the queue on the filesystem if it does 
// not exist. the port is used by Live-Mutex; 
// fp is our queue filepath

const q = new Queue({
    fp: path.resolve(process.env.HOME + '/testing.txt')
    port: 8888
});