express js send html with assets to api gateway in a microservices architecture

Question

I could not find any solutions that worked for me.

I am trying to create a simple microservices architecture with Node.js instances. The gateway microservice does not load the html with CSS, JS like the homepage microservice does.

At the moment I have 2 microservices:

1. Express server that sends index.html as file. It loads correctly the page with assets (css, images, javascript). I have used app.use(express.static('public')).

homepage:

const express = require('express')
const app     = express()
var path      = require("path")

app.use(express.static('public'))

app.get('/', (req, res) => {

    res.sendFile(path.join(__dirname+'/public/index.html'));
})

app.listen(3001, () => console.log('Homepage listening on port 3001!'))

2. Express server that receives requests and wants to deliver content to user. I am trying to create an API Gateway to filter traffic (on authentication for example) and write logs.

gateway:

const express = require('express')
const request = require('request-promise-native')
const app = express()

app.get('/', async (req, res) => {
    // Write logs in database
    const uri = "http://localhost:3001/"
    const result = await request(uri)
    res.send(result)
 })

 app.listen(3000, () => console.log('Public API Gateway listening on port 3000!'))

Any solution is really appreciated.

Thanks!