service.js

console.log("If module not found, install express globally `npm i express -g`!");
var port    = process.env.OPENSHIFT_NODEJS_PORT || process.env.VCAP_APP_PORT || process.env.PORT || process.argv[2] || 8765;
var express = require('express');
var Gun     = require('gun');

var app    = express();
app.use(Gun.serve);
app.use(express.static(__dirname));

var server = app.listen(port);
var gun = Gun({	file: 'data', web: server });

global.Gun = Gun; /// make global to `node --inspect` - debug only
global.gun = gun; /// make global to `node --inspect` - debug only

console.log('Server started on port ' + port + ' with /gun');

let evidence = gun.get('evidence3').put(null);

// Emulate event stream
for (let i = 0; i < 10000; i++) {
    setTimeout(function () {
        const txrecord = { txhash: i, filehash: i, metadata: 'test' }
        evidence.put( txrecord );
        console.log(i);
    }, 2000 * i);
}