hero-forge/server/main.js

const express = require('express')
const httpProxy = require('http-proxy')
const request = require('request')

const app = express()
const assetsProxy = httpProxy.createProxyServer({
  target: 'https://www.heroforge.com',
  xfwd: false,
  secure: false,
  changeOrigin: true,
  autoRewrite: true,
  protocolRewrite: 'http',
  selfHandleResponse: false
})

app.use(/^\/$/, (req, res) => {
  request('https://www.heroforge.com', (err, response, body) => {
    if (err) res.status(500).send(err)
    else {
      let html = body
      .replace(/<script[^>]+googletagmanager.*<\/script>/g, '<!-- google tag manager -->')
      .replace(/<img[^>]+facebook.*>/g, '<!-- facebook -->')
      .replace('https://connect.facebook.net/en_US/fbevents.js', '')
      .replace('</body>', '<script type="text/javascript" src="/custom/main.js"></script></body>')
      res.status(200)
      .set('Content-Type', 'text/html')
      .send(html)      
    }
  })
})

app.use('/custom/', express.static('./dist'))

app.use('/', (req, res) => {
  assetsProxy.web(req, res)
})

app.listen(9011)