How to server second location using nginx server

Hi there,

I was following the tutorial: https://www.digitalocean.com/community/tutorials/how-to-set-up-a-node-js-application-for-production-on-ubuntu-16-04

Where they set up Nginx as a reverse Proxy server. I tried serving a second simple node application on port 7474.

test.js

var express = require('express');
var app = express();

app.get('/', function(req, res) {
    res.send('Hello There!')
})
app.listen(7474, function() {
    console.log('listening on port 7474')
})

I followed the tutorial and added a second location to my /etc/nginx/sites-available/default File

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

        root /var/www/html;

        index index.html index.htm index.nginx-debian.html;

        server_name _;

        location / {
        proxy_pass http://localhost:8080;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }

    location /neo4j {
        proxy_pass http://localhost:7474;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }
}

When accessing my server under http://123.45.6.789/neo4j results in a 404 error.

What am I doing wrong?