One File App

A complete user management application in a single JavaScript file with no external dependencies.

Features

• Zero dependencies - Uses only native Node.js modules
• Single file - All code in app.js
• JSON database - Simple persistence in users.json
• Web interface - HTML, CSS and JavaScript included
• REST API - Endpoints to manage users

Quick Start

git clone https://github.com/luangrezende/one-file-app.git
cd one-file-app
node app.js

Open http://localhost:3000 in your browser.

Project Structure

one-file-app/
├── app.js        # Complete application
├── users.json    # Database (created automatically)
└── README.md     # This file

What it does

• Add users
• List users
• Delete users
• Data validation
• Responsive interface
• Data persistence

API

• GET / - Web interface
• GET /api/users - List all users
• POST /api/users - Add a new user
• DELETE /api/users/:id - Delete a user

Tech Stack

• Node.js (http, fs, path, url)
• HTML5 + CSS3 + JavaScript
• JSON for persistence

Deploy

Railway (Recommended)

1. Push your code to GitHub
2. Go to railway.app
3. Connect your GitHub repo
4. Deploy automatically!