Add RevPi docs to Node-RED hardware section

src/node-red/hardware/revolutionary-pi.md

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+---
+eleventyNavigation:
+  key: Revolutionary Pi
+  parent: Hardware
+meta:
+   title: Setting Node-RED on Revolutionary Pi
+   description: Learn how to set up Node-RED on a Raspberry Pi 4, including installation, configuration, and integration with sensors and actuators.
+   keywords: node-red, raspberry pi, Revolutionary Pi
+---
+
+# {{meta.title}}
+
+Revolution Pi is an industrial-grade computer based on the Raspberry Pi Compute Module, designed specifically for use in industrial automation environments, offering features like robust hardware, a real-time operating system, and support for various industrial protocols, allowing it to be used as an IIoT gateway to collect and send data from factory machines to the cloud.
+
+## Goal
+
+This documentation guides users through installing the FlowFuse Device Agent on a Revolution Pi. The agent enables running Node-RED on the edge device, managing it remotely via FlowFuse, and accessing [enterprise features](/product/features/) that are useful for organizations. Since the device does not come with Node.js preinstalled, this guide covers installing both Node.js and the FlowFuse Device Agent.
+
+## Prerequisites
+
+Before proceeding with the installation, ensure you have the following:
+
+- **Revolutionary Pi** – A functioning device with internet access.
+- **Sudo Privileges** – Administrator access to install required packages.
+- **Network Access** – Ensure outbound traffic is allowed on port 443 for connections to:
+
+  - `app.flowfuse.com:443`
+  - `mqtt.flowfuse.cloud:443`
+
+- **Firewall Rules** – The Device Agent does not install Node-RED at startup. When receiving a snapshot, it downloads the required Node-RED version. Allow access to:
+
+  - `https://registry.npmjs.com`
+
+## Getting Started
+
+This guide provides step-by-step instructions for setting up the FlowFuse Device Agent on a Revolutionary Pi. It begins with installing Node.js, a prerequisite for running the agent, followed by the installation and configuration of the FlowFuse Device Agent.
+
+### Installing Node.js
+
+Since Node.js is not preinstalled on the Revolutionary Pi, follow these steps to install it:
+
+#### Step 1: Update System Packages
+
+```bash
+sudo apt update && sudo apt upgrade -y
+```
+
+#### Step 2: Install Required Dependencies
+
+Before adding the NodeSource repository, ensure that curl is installed, as it is required to download the setup script.
+
+```bash
+sudo apt install curl -y
+```
+
+#### Step 3: Install the Latest LTS Version of Node.js
+
+```bash
+curl -fsSL https://deb.nodesource.com/setup_lts.x | sudo -E bash -
+```
+
+#### Step 4: Verify Installation
+
+```bash
+node -v
+```
+
+After running the verification command, the installed Node.js version should be displayed in the terminal.
+
+> **Note:** Ensure that the installed version is **Node.js 18 or later**,as this is the recommended version for optimal compatibility with the device agent.
+
+### Installing the FlowFuse Device Agent
+
+Once Node.js is installed, proceed with the installation of the FlowFuse Device Agent.
+
+#### Step 1: Install the FlowFuse Device Agent
+
+```bash
+sudo npm install -g @flowfuse/device-agent
+```
+
+### Registering the Device Agent to FlowFuse and Running It 
+
+After installing the FlowFuse Device Agent, the next step is to link the Revolutionary Pi to your [FlowFuse team](/docs/user/team/). This allows the device to be managed remotely and receive Node-RED deployments.
+
+#### Step 1: Add a New Device to Your FlowFuse Team
+
+Follow the instructions in the official documentation to add your device to your FlowFuse team: [Add a Remote Instance](/docs/device-agent/register/#add-remote-instance).
+
+**Add a Remote Instance**.
+
+Once you register the device, you will receive the configuration details required to connect it to your team. Copy the provided configuration.
+
+#### Step 2: Create the Configuration Directory
+
+Create a directory for the FlowFuse device and its configuration:
+
+```bash
+sudo mkdir -p /opt/flowfuse-device
+sudo chown -R $USER /opt/flowfuse-device
+```
+
+#### Step 3: Add the Configuration File
+
+Open the configuration file in a text editor:
+
+```bash
+sudo nano /opt/flowfuse-device/device.yml
+```
+
+Paste the configuration details you copied from the FlowFuse web interface into the file, then save it by pressing **Ctrl + X**, followed by **Y**, and then **Enter**.
+
+If you prefer using the web interface for configuring the device, refer to the [FlowFuse documentation](/docs/device-agent/register/#device-agent-web-ui).
+
+> **Alternative:** Instead of manually performing **Steps 1, 2, and 3**, you can use a **single command** to simplify the process, saving extra steps and time. For more details, refer to the **FlowFuse Quickstart Guide**.
+
+#### Step 4: Start the Device Agent
+
+Run the following command to start the device agent:
+
+```bash
+flowfuse-device-agent
+```
+
+This will connect the device to your FlowFuse team and allow remote management.