dlna-http-server.js

var express = require('express');

var subtitlesUrl = 'http://your-local-ip:8000/subtitles.vtt';

var app = express();

app.use(function(req, res, next) {
  res.header('transferMode.dlna.org', 'Streaming');
  res.header('contentFeatures.dlna.org', 'DLNA.ORG_OP=01;DLNA.ORG_CI=0;DLNA.ORG_FLAGS=01700000000000000000000000000000')
  res.header('CaptionInfo.sec', subtitlesUrl);
  next();
});

app.use('/', express.static(__dirname));

app.listen(8000, '0.0.0.0');