# Getting Started with Your First App

Welcome to the guide on building your first app with our platform! This document will help you set up your development environment and create a simple application.

## Prerequisites

Before you begin, ensure that you have the following installed:
- Node.js (version 14 or higher)
- npm (Node Package Manager)

## Setting Up Your Environment

1. **Install Node.js**: Download and install Node.js from the [official website](https://nodejs.org).
2. **Verify Installation**:
   ```bash
   node -v
   npm -v
   ```
   Ensure that both commands return version numbers indicating successful installation.

## Creating Your First App

Now that your environment is set up, let's create a simple application.

### Step 1: Initialize Project

Open your terminal and run:
```bash
mkdir my-first-app
cd my-first-app
npm init -y
```

### Step 2: Install Dependencies

Next, install the necessary package:
```bash
npm install express
```

### Step 3: Create Your App

Create a file named `app.js`:
```javascript
const express = require('express');
const app = express();
const PORT = process.env.PORT || 3000;

app.get('/', (req, res) => {
    res.send('Hello World!');
});

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

### Step 4: Run Your App

Finally, start your application by running:
```bash
node app.js
```

Visit `http://localhost:3000` in your web browser, and you should see the message "Hello World!" displayed.