Node/Express on Chromebook: Cannot GET /summary”

Backend Development
1

Hi, I’m learning backend development on a Chromebook (Linux Beta / Crostini) and having trouble with a simple Express server.

My server.js file looks like this:

const express = require('express');

const app = express();

const port = 3000;

// Simple home route
app.get('/', (req, res) => {
  res.send('Client Portal API is running');
});

// Summary route
app.get('/summary', (req, res) => {
  res.json({
    user: 'Jane Doe',
    status: 'Active',
    plan: 'Standard',
    balance: '$120.00',
    nextAppointment: '2026-02-01',
    primaryContact: 'Alex Smith',
    lastLogin: '2026-01-10 14:32',
  });
});

app.listen(port, () => {
  console.log(`Server listening on http://localhost:${port}`);
});

cd ~/client-portal-backend
node server.js

The terminal prints:
Server listening on http://localhost:3000Then, in Firefox inside Linux, I go to:
http://localhost:3000/summaryBut I see this message in the browser:
Cannot GET /summary

hen what you already pasted:Device: Chromebook with Linux (Beta) / Crostini
Node version: (output of node -v)
npm version: (output of npm -v)

I’ve attached screenshots of:

  • The terminal running node server.js
  • The browser showing http://localhost:3000/summary and the error message

Can someone please help me figure out?After that:Make sure Category is set to Backend Development or JavaScript. �Click the image icon in the toolbar to upload your screenshots. �

2

is your root path working okay? (we can’t see any of the screenshots you mentioned btw)

3

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