I try to make two projects running on a Azure VM. (let say app1 and app2.) Express apps.

proxy by Aginx as below:

server {
    listen 80 default_server;
    listen [::]:80 default_server;

    server_name domain.online;

    location / {
        proxy_pass http://127.0.0.1:3000/;
    }

    location /pos/ {
        proxy_pass http://127.0.0.1:8080/;

    }
}

app1 works on /
app2 does NOT work on /pos, browser shows Cannot GET /

I use console.log find that
app.js is works,
routes is wroks,
routes/index.js works,
routes/modules/home.js works, because log shows ‘home’

routes/modules/home.js as below and
console did not show ‘get /’

const express = require('express')
const router = express.Router()

console.log('home')
router.get('/', (req, res) => {
  console.log('get /')
  res.render('index')
})

module.exports = router

apps work on localhost.
apps work on vm with docker image.

I don’t know why I cannot get the url or anything I missed?

I tried revised my app, routes for /pos or domain.online/pos but not works.

I thinkg console shows home means the url and ports setting is find.
But I just cannot GET / by router.get